diff --git a/f_config/SESSION.php b/f_config/SESSION.php
index f6bdbdbf..7ca6aa45 100644
--- a/f_config/SESSION.php
+++ b/f_config/SESSION.php
@@ -2,9 +2,8 @@
 namespace sammo;
 
 require_once('_common.php');
-require_once(ROOT.'/f_func/class._Session.php');
 
-$SESSION = new _Session();
+$SESSION = new Session();
 
 if(!$SESSION->isLoggedIn()) {
     header ("Location: ".ROOT);
diff --git a/i_entrance/j_change_password.php b/i_entrance/j_change_password.php
index 36b4b461..46e6b34e 100644
--- a/i_entrance/j_change_password.php
+++ b/i_entrance/j_change_password.php
@@ -3,9 +3,8 @@ namespace sammo;
 
 require_once('_common.php');
 require_once(ROOT.'/f_config/DB.php');
-require_once(ROOT.'/f_func/class._Session.php');
 
-$SESSION = new _Session();
+$SESSION = new Session();
 
 if(!$SESSION->isLoggedIn()) {
     Json::die([
@@ -28,11 +27,11 @@ $db = getRootDB();
 
 $userInfo = $db->update('member',[
     'pw'=>$db->sqleval('sha2(concat(salt, %s, salt), 512)', $newPw)
-], 'no=%i and pw=sha2(concat(salt, %s, salt), 512)', $SESSION->NoMember(), $pw);
+], 'no=%i and pw=sha2(concat(salt, %s, salt), 512)', $SESSION->noMember(), $pw);
 
 if(!$db->affectedRows()){
     $db->insert('member_log', [
-        'member_no'=>$SESSION->NoMember(),
+        'member_no'=>$SESSION->noMember(),
         'action_type'=>'change_pw',
         'action'=>json_encode([
             'type'=>'plain',
@@ -47,7 +46,7 @@ if(!$db->affectedRows()){
 }
 
 $db->insert('member_log', [
-    'member_no'=>$SESSION->NoMember(),
+    'member_no'=>$SESSION->noMember(),
     'action_type'=>'change_pw',
     'action'=>json_encode([
         'type'=>'plain',
diff --git a/i_entrance/j_delete_me.php b/i_entrance/j_delete_me.php
index d5912a9f..a8f88882 100644
--- a/i_entrance/j_delete_me.php
+++ b/i_entrance/j_delete_me.php
@@ -4,9 +4,8 @@ namespace sammo;
 require_once('_common.php');
 require_once(ROOT.'/f_func/class._Time.php');
 require_once(ROOT.'/f_config/DB.php');
-require_once(ROOT.'/f_func/class._Session.php');
 
-$SESSION = new _Session();
+$SESSION = new Session();
 
 if(!$SESSION->isLoggedIn()) {
     Json::die([
@@ -31,7 +30,7 @@ $db = getRootDB();
 
 $userInfo = $db->queryFirstRow('SELECT oauth_id, oauth_type, email, delete_after FROM MEMBER '.
     'WHERE `no`=%i and pw=sha2(concat(salt, %s, salt), 512)',
-    $SESSION->NoMember(), $pw);
+    $SESSION->noMember(), $pw);
 
 if(!$userInfo){
     Json::die([
@@ -49,7 +48,7 @@ if($userInfo['delete_after']){
 
 $db->update('member',[
     'delete_after'=>_Time::DatetimeFromNowMinute(60*24*30)
-], 'no=%i', $SESSION->NoMember());
+], 'no=%i', $SESSION->noMember());
 
 if(!$db->affectedRows()){
     Json::die([
@@ -61,7 +60,7 @@ if(!$db->affectedRows()){
 
 
 $db->insert('member_log', [
-    'member_no'=>$SESSION->NoMember(),
+    'member_no'=>$SESSION->noMember(),
     'action_type'=>'delete'
 ]);
 
diff --git a/i_entrance/j_get_user_info.php b/i_entrance/j_get_user_info.php
index 6a18f68e..49848764 100644
--- a/i_entrance/j_get_user_info.php
+++ b/i_entrance/j_get_user_info.php
@@ -3,9 +3,8 @@ namespace sammo;
 
 require_once('_common.php');
 require_once(ROOT.'/f_config/DB.php');
-require_once(ROOT.'/f_func/class._Session.php');
 
-$SESSION = new _Session();
+$SESSION = new Session();
 
 if(!$SESSION->isLoggedIn()) {
     Json::die([
@@ -17,7 +16,7 @@ if(!$SESSION->isLoggedIn()) {
 // 외부 파라미터
 
 $db = getRootDB();
-$member = $db->queryFirstRow('SELECT `id`, `name`, `grade`, `picture` FROM `MEMBER` WHERE `NO` = %i', $SESSION->NoMember());
+$member = $db->queryFirstRow('SELECT `id`, `name`, `grade`, `picture` FROM `MEMBER` WHERE `NO` = %i', $SESSION->noMember());
 
 if(!$member['picture']){
     $picture = IMAGE.'/default.jpg';
diff --git a/i_entrance/j_icon_change.php b/i_entrance/j_icon_change.php
index 4103f716..e796414c 100644
--- a/i_entrance/j_icon_change.php
+++ b/i_entrance/j_icon_change.php
@@ -3,9 +3,8 @@ namespace sammo;
 
 require_once('_common.php');
 require_once(ROOT.'/f_config/DB.php');
-require_once(ROOT.'/f_func/class._Session.php');
 
-$SESSION = new _Session();
+$SESSION = new Session();
 
 if(!$SESSION->isLoggedIn()) {
     Json::die([
@@ -30,7 +29,7 @@ $imageType = $size[2];
 $availableImageType = array('.jpg'=>IMAGETYPE_JPEG, '.png'=>IMAGETYPE_PNG, '.gif'=>IMAGETYPE_GIF);
 
 $db = getRootDB();
-$member = $db->queryFirstRow('SELECT `ID`, `PICTURE` FROM `MEMBER` WHERE `NO` = %i', $SESSION->NoMember());
+$member = $db->queryFirstRow('SELECT `ID`, `PICTURE` FROM `MEMBER` WHERE `NO` = %i', $SESSION->noMember());
 
 
 $picName = $member['PICTURE'];
@@ -88,7 +87,7 @@ if(!is_uploaded_file($image['tmp_name'])) {
         getRootDB()->update('MEMBER',[
             'PICTURE' => $pic,
             'IMGSVR' => 1
-        ], 'NO=%i', $SESSION->NoMember());
+        ], 'NO=%i', $SESSION->noMember());
 
         $servers = [];
 
diff --git a/i_entrance/j_icon_delete.php b/i_entrance/j_icon_delete.php
index a1eac890..9dbc0e65 100644
--- a/i_entrance/j_icon_delete.php
+++ b/i_entrance/j_icon_delete.php
@@ -3,9 +3,8 @@ namespace sammo;
 
 require_once('_common.php');
 require_once(ROOT.'/f_config/DB.php');
-require_once(ROOT.'/f_func/class._Session.php');
 
-$SESSION = new _Session();
+$SESSION = new Session();
 
 if(!$SESSION->isLoggedIn()) {
     Json::die([
@@ -18,7 +17,7 @@ if(!$SESSION->isLoggedIn()) {
 
 $respone = [];
 $db = getRootDB();
-$picName = $db->queryFirstField('SELECT picture FROM `MEMBER` WHERE `NO` = %i', $SESSION->NoMember());
+$picName = $db->queryFirstField('SELECT picture FROM `MEMBER` WHERE `NO` = %i', $SESSION->noMember());
 
 if($picName && strlen($picName) > 11){
     $dt = substr($picName, -8);
@@ -43,7 +42,7 @@ if($dt == $rf) {
     $db->update('MEMBER', [
         'PICTURE'=>'default.jpg',
         'IMGSVR'=>0,
-    ], 'NO=%i', $SESSION->NoMember());
+    ], 'NO=%i', $SESSION->noMember());
     
     $servers = [];
 
diff --git a/i_entrance/member/Post.php b/i_entrance/member/Post.php
index b4a72f30..8fb00c5b 100644
--- a/i_entrance/member/Post.php
+++ b/i_entrance/member/Post.php
@@ -12,7 +12,7 @@ $select = $_POST['select'];
 $no = $_POST['no'];
 
 $db = getRootDB();
-$member = $db->queryFirstRow('SELECT `GRADE` FROM `MEMBER` WHERE `NO` = %i', $SESSION->NoMember());
+$member = $db->queryFirstRow('SELECT `GRADE` FROM `MEMBER` WHERE `NO` = %i', $SESSION->noMember());
 
 if($member['GRADE'] < 6) {
     $response['result'] = 'FAIL';
diff --git a/index.php b/index.php
index 4188e0ff..c24e449f 100644
--- a/index.php
+++ b/index.php
@@ -11,7 +11,6 @@ if(!$SETTING->isExists()){
 }
 
 require(ROOT.'/f_config/DB.php');
-require(ROOT.'/f_func/class._Session.php');
 
 
 $SESSION = new _SESSION();
diff --git a/j_login.php b/j_login.php
index 9dd76fe0..63e0e710 100644
--- a/j_login.php
+++ b/j_login.php
@@ -2,14 +2,13 @@
 namespace sammo;
 
 require_once('_common.php');
-require_once(ROOT.'/f_func/class._Session.php');
 require_once(ROOT.'/f_func/class._String.php');
 require(ROOT.'/f_func/class._Time.php');
 require_once(ROOT.'/f_config/DB.php');
 
 
 
-$SESSION = new _Session();
+$SESSION = new Session();
 if($SESSION->isLoggedIn()){
     $SESSION->logout();
 }
diff --git a/oauth_kakao/j_change_pw.php b/oauth_kakao/j_change_pw.php
index c8af5bfb..f8acd449 100644
--- a/oauth_kakao/j_change_pw.php
+++ b/oauth_kakao/j_change_pw.php
@@ -3,7 +3,6 @@ namespace sammo;
 
 require(__DIR__.'/../d_setting/conf_kakao.php');
 require('_common.php');
-require(ROOT.'/f_func/class._Session.php');
 require(ROOT.'/f_config/DB.php');
 require(ROOT.'/f_func/class._Time.php');
 
@@ -11,14 +10,14 @@ use \kakao\Kakao_REST_API_Helper as Kakao_REST_API_Helper;
 
 $nowDate = _Time::DatetimeNow();
 
-$SESSION = new _Session();
+$SESSION = new Session();
 if(!$SESSION->isLoggedIn()){
     Json::die([
         'result'=>false,
         'reason'=>'로그인이 되어있지 않습니다'
     ]);
 }
-$userID = $SESSION->NoMember();
+$userID = $SESSION->noMember();
 $access_token = util::array_get($_SESSION['access_token']);
 $expires = util::array_get($_SESSION['expires']);
 $refresh_token = util::array_get($_SESSION['refresh_token']);
diff --git a/oauth_kakao/j_login_oauth.php b/oauth_kakao/j_login_oauth.php
index 618773df..f554707e 100644
--- a/oauth_kakao/j_login_oauth.php
+++ b/oauth_kakao/j_login_oauth.php
@@ -3,14 +3,13 @@ namespace sammo;
 
 require(__DIR__.'/../d_setting/conf_kakao.php');
 require('_common.php');
-require(ROOT.'/f_func/class._Session.php');
 require(ROOT.'/f_config/DB.php');
 require(ROOT.'/f_func/class._Time.php');
 require('kakao.php');
 
 use \kakao\Kakao_REST_API_Helper as Kakao_REST_API_Helper;
 
-$SESSION = new _Session();
+$SESSION = new Session();
 if($SESSION->isLoggedIn()){
     $SESSION->logout();
 }
diff --git a/f_func/class._Session.php b/src/sammo/Session.php
similarity index 70%
rename from f_func/class._Session.php
rename to src/sammo/Session.php
index fcb92b83..9a07aa15 100644
--- a/f_func/class._Session.php
+++ b/src/sammo/Session.php
@@ -4,12 +4,14 @@ namespace sammo;
 require(__dir__.'/../vendor/autoload.php');
 
 
-class _Session {
+class Session {
     public function __construct() {
         //session_cache_limiter('nocache, must_revalidate');
 
         // 세션 변수의 등록
-        session_start();
+        if (session_id() == ""){
+            session_start();
+        }
 
         //첫 등장
 
@@ -19,6 +21,24 @@ class _Session {
         }
     }
 
+    public function writeClose(){
+        session_write_close();
+    }
+
+    public function __set(string $name, mixed $value){
+        if($value === null){
+            unset($_SESSION[$name]);
+        }
+        else{
+            $_SESSION[$name] = $value;
+        }
+        
+    }
+
+    public function __get(string $name){
+        return util::array_get($_SESSION[$name]);
+    }
+
     public function set($key, $val) {
         $_SESSION[$key] = $val;
     }
@@ -46,7 +66,7 @@ class _Session {
     }
 
     public function isLoggedIn() {
-        if($this->NoMember()){
+        if($this->noMember()){
             return true;
         }
         else{
@@ -54,7 +74,7 @@ class _Session {
         }
     }
 
-    public function NoMember() {
+    public function noMember() {
         return $this->get('noMember');
     }