diff --git a/adm/admin.js b/adm/admin.js
index e5c2a3e04..a3f4c7d64 100644
--- a/adm/admin.js
+++ b/adm/admin.js
@@ -63,4 +63,12 @@ function delete_confirm()
         return true;
     else
         return false;
+}
+
+function delete_confirm2(msg)
+{
+    if(confirm(msg))
+        return true;
+    else
+        return false;
 }
\ No newline at end of file
diff --git a/adm/board_form.php b/adm/board_form.php
index 86497f74d..6e9d2a54c 100644
--- a/adm/board_form.php
+++ b/adm/board_form.php
@@ -159,7 +159,9 @@ $frm_submit = '<div class="btn_confirm01 btn_confirm">
     <input type="submit" value="확인" class="btn_submit" accesskey="s">
     <a href="./board_list.php?'.$qstr.'">목록</a>'.PHP_EOL;
 if ($w == 'u') $frm_submit .= '    <a href="./board_copy.php?bo_table='.$bo_table.'" id="board_copy" target="win_board_copy">게시판복사</a>
-    <a href="'.G5_BBS_URL.'/board.php?bo_table='.$board['bo_table'].'" class="btn_frmline">게시판 바로가기</a>'.PHP_EOL;
+    <a href="'.G5_BBS_URL.'/board.php?bo_table='.$board['bo_table'].'" class="btn_frmline">게시판 바로가기</a>
+    <a href="./board_thumbnail_delete.php?bo_table='.$board['bo_table'].'&amp;'.$qstr.'" onclick="return delete_confirm2(\'게시판 썸네일 파일을 삭제하시겠습니까?\');">게시판 썸네일 삭제</a>
+    '.PHP_EOL;
 $frm_submit .= '</div>';
 ?>
 
diff --git a/adm/board_thumbnail_delete.php b/adm/board_thumbnail_delete.php
new file mode 100644
index 000000000..53d7932b1
--- /dev/null
+++ b/adm/board_thumbnail_delete.php
@@ -0,0 +1,51 @@
+<?php
+$sub_menu = '300100';
+include_once('./_common.php');
+
+auth_check($auth[$sub_menu], 'w');
+
+if(!$board['bo_table'])
+    alert('존재하지 않는 게시판입니다.');
+
+$g5['title'] = $board['bo_subject'].' 게시판 썸네일 삭제';
+include_once('./admin.head.php');
+?>
+
+<div class="local_desc02 local_desc">
+    <p>
+        완료 메세지가 나오기 전에 프로그램의 실행을 중지하지 마십시오.
+    </p>
+</div>
+
+<?php
+$dir = G5_DATA_PATH.'/file/'.$bo_table;
+
+$cnt = 0;
+if(is_dir($dir)) {
+    $files = glob($dir.'/thumb-*');
+    if (is_array($files)) {
+        foreach($files as $thumbnail) {
+            $cnt++;
+            @unlink($thumbnail);
+
+            echo '<li>'.$thumbnail.'</li>'.PHP_EOL;
+
+            flush();
+
+            if ($cnt%10==0)
+                echo PHP_EOL;
+        }
+    }
+
+    echo '<li>완료됨</li></ul>'.PHP_EOL;
+    echo '<div class="local_desc01 local_desc"><p><strong>썸네일 '.$cnt.'건의 삭제 완료됐습니다.</strong></p></div>'.PHP_EOL;
+} else {
+    echo '<p>첨부파일 디렉토리가 존재하지 않습니다.</p>';
+}
+?>
+
+<div><a href="./board_form.php?w=u&amp;bo_table=<?php echo $bo_table; ?>&amp;<?php echo $qstr; ?>">게시판 수정으로 돌아가기</a></div>
+
+<?php
+include_once('./admin.tail.php');
+?>
\ No newline at end of file