diff --git a/ecs/dataimport/dataimport/chk.py b/ecs/dataimport/dataimport/chk.py
index 52e1cb4a..d3d8801c 100644
--- a/ecs/dataimport/dataimport/chk.py
+++ b/ecs/dataimport/dataimport/chk.py
@@ -6,6 +6,7 @@ import sys
 from end import end
 from error import error
 from common import debug_log
+from common import convert_quotechar
 
 # 定数
 DIRECTORY_WORK = '/work/'
@@ -82,12 +83,12 @@ def check(bucket_name, target_data_source, target_file_name, settings_key, log_i
         work_obj = s3_resource.Object(bucket_name, work_key)
         work_response = work_obj.get()
         work_data = io.TextIOWrapper(io.BytesIO(work_response["Body"].read()), encoding=settings_list[SETTINGS_ITEM["charCode"]], newline=LINE_FEED_CODE[settings_list[SETTINGS_ITEM["lineFeedCode"]]])
-        work_header_list = []
-        for line in csv.reader(work_data, quotechar=settings_list[SETTINGS_ITEM["quotechar"]], delimiter=settings_list[SETTINGS_ITEM["delimiter"]]):
-            if int(settings_list[SETTINGS_ITEM["headerFlag"]]) == True:
+        work_header_list = [] 
+        for i, line in enumerate(csv.reader(work_data, quotechar=convert_quotechar(settings_list[SETTINGS_ITEM["quotechar"]]), delimiter=settings_list[SETTINGS_ITEM["delimiter"]])):
+            if int(settings_list[SETTINGS_ITEM["headerFlag"]]) == True and i == 0:
+                work_header_list = line
                 continue
             
-            work_header_list = line
             break
 
         # ② C-0のデータ件数チェックを開始する
diff --git a/ecs/dataimport/dataimport/common.py b/ecs/dataimport/dataimport/common.py
index 8b8eeed6..946defe4 100644
--- a/ecs/dataimport/dataimport/common.py
+++ b/ecs/dataimport/dataimport/common.py
@@ -1,5 +1,6 @@
 from datetime import datetime
 
+
 # 定数
 LOG_LEVEL = {"d": 'Debug'}
 MODE_TYPE = {
@@ -11,3 +12,18 @@ MODE_TYPE = {
 def debug_log(log, log_info, mode):
     if MODE_TYPE['d'] == mode:
         print(f'{datetime.now():%Y-%m-%d %H:%M:%S} {log_info} {LOG_LEVEL["d"]} {log}')
+
+def convert_quotechar(quotechar):
+    """csvモジュールの囲い文字を変換する
+
+    Args:
+        quotechar : 項目囲い文字の設定値
+
+    Returns:
+        空文字、空白文字の場合→None
+        それ以外→設定値をそのまま帰す
+    """
+    if (quotechar.strip(' ') == ''):
+        return None
+
+    return quotechar
diff --git a/ecs/dataimport/dataimport/main.py b/ecs/dataimport/dataimport/main.py
index 221a7132..c0894209 100644
--- a/ecs/dataimport/dataimport/main.py
+++ b/ecs/dataimport/dataimport/main.py
@@ -7,6 +7,7 @@ import io
 import csv
 from error import error
 from common import debug_log
+from common import convert_quotechar
 
 # 定数
 DIRECTORY_WORK = '/work/'
@@ -117,7 +118,7 @@ def main(bucket_name, target_data_source, target_file_name, settings_key, db_inf
         settings_db_columu_list = settings_list[SETTINGS_ITEM["dbColumuName"]].rstrip().split(',')
         settings_replace_comma_list = settings_list[SETTINGS_ITEM["commaReplaceColumns"]].rstrip().split(',')
 
-        for line in csv.reader(work_data, quotechar=settings_list[SETTINGS_ITEM["quotechar"]], delimiter=settings_list[SETTINGS_ITEM["delimiter"]]):
+        for line in csv.reader(work_data, quotechar=convert_quotechar(settings_list[SETTINGS_ITEM["quotechar"]]), delimiter=settings_list[SETTINGS_ITEM["delimiter"]]):
             try:
                 if int(settings_list[SETTINGS_ITEM["headerFlag"]]) == True and index == 0:
                     index += 1