diff --git a/lib/thumb.lib.php b/lib/thumb.lib.php
deleted file mode 100644
index 819fb05de..000000000
--- a/lib/thumb.lib.php
+++ /dev/null
@@ -1,128 +0,0 @@
-<?php
-if (!defined('_GNUBOARD_')) exit;
-
-/*******************************************************************************
-    썸네일 Class
-
-    사용법 :
-
-    $thumb = new g4_thumbnail(경로, 썸네일이미지폭);
-    $thumb->run(이미지 경로가 포함된 컨텐츠);
-
-*******************************************************************************/
-class g4_thumb {
-    var $path;
-    var $width;
-    var $red = 0xff;
-    var $green = 0xff;
-    var $blue = 0xff;
-    var $quality = 100;
-    var $permission = G5_FILE_PERMISSION;
-
-    function g4_thumb($path, $width) {
-        $this->set_path($path);
-        $this->set_width($width);
-    }
-
-    // 경로
-    function set_path($path) {
-        $this->path = $path;
-        @mkdir($path, G5_DIR_PERMISSION);
-        @chmod($path, G5_DIR_PERMISSION);
-    }
-
-    function set_width($width) {
-        $this->width = $width;
-    }
-
-    function get_width() {
-        return $this->width;
-    }
-
-    function set_bgcolor($red, $green, $blue) {
-        $this->red   = $red;
-        $this->green = $green;
-        $this->blue  = $blue;
-    }
-
-    function set_quality($quality) {
-        $this->quality = $quality;
-    }
-
-    function set_permission($permission) {
-        $this->permission = $permission;
-    }
-
-    function create($srcimg, $thumbfile) {
-        $width = $this->get_width();
-        $source = null;
-        $size = @getimagesize($srcimg);
-        if ($size[2] == 1)
-            $source = @imagecreatefromgif($srcimg);
-        else if ($size[2] == 2)
-            $source = @imagecreatefromjpeg($srcimg);
-        else if ($size[2] == 3)
-            $source = @imagecreatefrompng($srcimg);
-
-        if ($source == null)
-            return '';
-
-        // 이미지의 폭이 설정폭 보다 작다면
-        if ($size[0] < $width) {
-            $width  = $size[0];
-            $height = $size[1];
-        } else {
-            $rate = $width / $size[0];
-            $height = (int)($size[1] * $rate);
-        }
-
-        $target = @imagecreatetruecolor($width, $height);
-        $bgcolor = @imagecolorallocate($target, $this->red, $this->green, $this->blue); // 썸네일 배경
-        imagefilledrectangle($target, 0, 0, $width, $height, $bgcolor);
-        imagecopyresampled($source, $source, 0, 0, 0, 0, $width, $height, $size[0], $size[1]);
-        imagecopy($target, $source, 0, 0, 0, 0, $size[0], $size[1]);
-        imagejpeg($target, $thumbfile, $this->quality);
-        chmod($thumbfile, $this->permission); // 추후 삭제를 위하여 파일모드 변경
-        return $thumbfile;
-    }
-
-    function thumbnail($matches)
-    {
-        foreach ($matches as $img) {
-            preg_match("/src=[\"\']?([^\"\'\s>]+)/i", $img, $m);
-            $src = trim($m[1]);
-
-            $result = true;
-            if (preg_match("/\.(jpe?g|png|gif)$/i", $src)) {
-                // 유일한 파일명을 만든다.
-                $filename = md5($src).'_'.$this->width;
-                $thumb = $this->path.'/'.$filename;
-
-                if (!file_exists($thumb)) {
-                    $result = $this->create($src, $thumb);
-                }
-            }
-            else {
-                $thumb = $src;
-            }
-
-            if ($result) {
-                $size = @getimagesize($src);
-                if ($size[0] < $this->width) {
-                    return "<img src='$thumb' width='$size[0]' />";
-                } else {
-                    return "<a href='$src' target='_blank' title='새창으로 크게 보기'><img src='$thumb' width='{$this->width}' border='0' /></a>";
-                }
-            }
-        }
-    }
-
-    function run($content)
-    {
-        //return preg_replace_callback('#<img[^>]+>#iS', create_function('$matches', 'return g4_thumb::thumbnail($matches);'), $content);
-        //return preg_replace_callback('#<img[^>]+>#iS', array('g4_thumb', 'thumbnail'), $content);
-        //return preg_replace_callback('#<img[^>]+>#iS', 'g4_thumb::thumbnail', $content);
-        return preg_replace_callback('#<img[^>]+>#iS', array($this, 'thumbnail'), $content);
-    }
-}
-?>
\ No newline at end of file
diff --git a/mobile/shop/itemqalist.php b/mobile/shop/itemqalist.php
index 00f01f867..6f7e59ed9 100644
--- a/mobile/shop/itemqalist.php
+++ b/mobile/shop/itemqalist.php
@@ -1,6 +1,5 @@
 <?php
 include_once('./_common.php');
-include_once(G5_LIB_PATH.'/thumb.lib.php');
 
 $sfl = trim($_REQUEST['sfl']);
 $stx = trim($_REQUEST['stx']);
diff --git a/mobile/shop/itemuselist.php b/mobile/shop/itemuselist.php
index 5cd6e5c38..8ffacecf1 100644
--- a/mobile/shop/itemuselist.php
+++ b/mobile/shop/itemuselist.php
@@ -1,6 +1,5 @@
 <?php
 include_once('./_common.php');
-include_once(G5_LIB_PATH.'/thumb.lib.php');
 
 $sfl = trim($_REQUEST['sfl']);
 $stx = trim($_REQUEST['stx']);
diff --git a/shop/itemqalist.php b/shop/itemqalist.php
index 2f549c98c..ba13c3344 100644
--- a/shop/itemqalist.php
+++ b/shop/itemqalist.php
@@ -6,8 +6,6 @@ if (G5_IS_MOBILE) {
     return;
 }
 
-include_once(G5_LIB_PATH.'/thumb.lib.php');
-
 $sfl = trim($_REQUEST['sfl']);
 $stx = trim($_REQUEST['stx']);
 
diff --git a/shop/itemuselist.php b/shop/itemuselist.php
index eacbc2086..ccbc4f9fd 100644
--- a/shop/itemuselist.php
+++ b/shop/itemuselist.php
@@ -6,8 +6,6 @@ if (G5_IS_MOBILE) {
     return;
 }
 
-include_once(G5_LIB_PATH.'/thumb.lib.php');
-
 $sfl = trim($_REQUEST['sfl']);
 $stx = trim($_REQUEST['stx']);