diff --git a/ecs/jskult-webapp/src/model/internal/master_mainte_csv.py b/ecs/jskult-webapp/src/model/internal/master_mainte_csv.py
index d8714f7a..a7997298 100644
--- a/ecs/jskult-webapp/src/model/internal/master_mainte_csv.py
+++ b/ecs/jskult-webapp/src/model/internal/master_mainte_csv.py
@@ -392,7 +392,7 @@ class MasterMainteChangeInstEmpCSVItem(MasterMainteCSVItem):
             if len(self.change_end_date) == 0:
                 error_list.append(self.make_require_error_message(self.line_num,
                                                                   constants.CHANGE_INST_CSV_LOGICAL_NAMES[
-                                                                      constants.CSV_CHANGE_INST_EMP_END_DATE_COL_NO]))
+                                                                      constants.CSV_CHANGE_CHANGE_END_DATE_COL_NO]))
         elif self.comment == '担当者修正':
             if len(self.inst_cd) == 0:
                 error_list.append(self.make_require_error_message(
@@ -421,7 +421,7 @@ class MasterMainteChangeInstEmpCSVItem(MasterMainteCSVItem):
 
     def check_emp_cd_exists(self) -> list[str]:
         error_list = []
-        if not self.start_date or not self.emp_cd:
+        if not self.inst_emp_start_date or not self.emp_cd:
             return error_list
 
         if self.comment != '追加' and self.comment != '担当者修正':