diff --git a/adm/board_form.php b/adm/board_form.php
index ec6a2e1df..d71dccbfd 100644
--- a/adm/board_form.php
+++ b/adm/board_form.php
@@ -1242,7 +1242,7 @@ $pg_anchor = '<ul class="anchor">
                 <label for="bo_<?php echo $i ?>_subj">여분필드 <?php echo $i ?> 제목</label>
                 <input type="text" name="bo_<?php echo $i ?>_subj" id="bo_<?php echo $i ?>_subj" value="<?php echo get_text($board['bo_'.$i.'_subj']) ?>" class="frm_input">
                 <label for="bo_<?php echo $i ?>">여분필드 <?php echo $i ?> 값</label>
-                <input type="text" name="bo_<?php echo $i ?>" value="<?php echo get_text($board['bo_'.$i]) ?>" id="bo_<?php echo $i ?>" class="frm_input">
+                <input type="text" name="bo_<?php echo $i ?>" value="<?php echo get_text($board['bo_'.$i]) ?>" id="bo_<?php echo $i ?>" class="frm_input extra-value-input">
             </td>
             <td class="td_grpset">
                 <input type="checkbox" name="chk_grp_<?php echo $i ?>" value="1" id="chk_grp_<?php echo $i ?>">
diff --git a/adm/css/admin.css b/adm/css/admin.css
index 5b31afdc1..ed58130fd 100644
--- a/adm/css/admin.css
+++ b/adm/css/admin.css
@@ -403,6 +403,9 @@ tfoot th {}
 #anc_bo_extra label {display:inline-block;width:100px}
 #anc_bo_extra input {margin-right:10px}
 
+/* 게시판 여분필드 값 input style 로빈아빠님 제안 */
+#anc_bo_extra input.extra-value-input {width:calc(100% - 370px);}
+
 /* 접속자집계 목록 */
 .tbl_visit_list td {text-align:center}
 .visit_bar {position:relative}