diff --git a/ecs/jskult-webapp/src/static/css/ultStyle.css b/ecs/jskult-webapp/src/static/css/ultStyle.css
index 3754f935..c1ace1d4 100644
--- a/ecs/jskult-webapp/src/static/css/ultStyle.css
+++ b/ecs/jskult-webapp/src/static/css/ultStyle.css
@@ -5,7 +5,7 @@
 }
 
 body {
-    margin: 8px;    
+    margin: 8px;
     background-color: LightCyan;
     font-family: "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", "メイリオ", Meiryo, Osaka, "ＭＳ Ｐゴシック", "MS PGothic", sans-serif;
 }
@@ -280,15 +280,15 @@ table{
 }
 
 .doctorSearchBt{
-    min-width: 180px;    
+    min-width: 180px;
 }
 
 .doctorInfoBt{
-    min-width: 105px;    
+    min-width: 105px;
 }
 
 .instSearchBt{
-    min-width: 180px;    
+    min-width: 180px;
 }
 
 .instHeaderTable{
@@ -366,6 +366,10 @@ table{
     width: 14%;
 }
 
+.menteDateTextbox{
+    width: 85%;
+}
+
 .hpAssrtTd{
     width: 12%;
 }
diff --git a/ecs/jskult-webapp/src/templates/instInfo.html b/ecs/jskult-webapp/src/templates/instInfo.html
index 2baf88ec..2c5e717f 100644
--- a/ecs/jskult-webapp/src/templates/instInfo.html
+++ b/ecs/jskult-webapp/src/templates/instInfo.html
@@ -259,7 +259,7 @@
                 <td class="hpInfoColumn">病床数(定員)</td>
                 <td class="instData"><input type="text" readonly="readonly" value="{{ultmarc.inst_info_data.bed_num or ''}}" class="xSmallTextbox numberBox"></td>
                 <td class="hpInfoColumn captionMenteDate">メンテ年月日</td>
-                <td class="instData menteDate"><input type="text" readonly="readonly" value="{{ultmarc.inst_info_data.prmit_bed_maint_ymd or ''}}" class="repreTextbox"></td>
+                <td class="instData menteDate"><input type="text" readonly="readonly" value="{{ultmarc.inst_info_data.prmit_bed_maint_ymd or ''}}" class="menteDateText"></td>
             </tr>
         </tbody>
     </table>