diff --git a/django/db/backends/oracle/utils.py b/django/db/backends/oracle/utils.py
index bbfd7f6a39..e3786541af 100644
--- a/django/db/backends/oracle/utils.py
+++ b/django/db/backends/oracle/utils.py
@@ -55,9 +55,9 @@ class Oracle_datetime(datetime.datetime):
 
 class BulkInsertMapper:
     BLOB = 'TO_BLOB(%s)'
-    CLOB = 'TO_CLOB(%s)'
     DATE = 'TO_DATE(%s)'
     INTERVAL = 'CAST(%s as INTERVAL DAY(9) TO SECOND(6))'
+    NCLOB = 'TO_NCLOB(%s)'
     NUMBER = 'TO_NUMBER(%s)'
     TIMESTAMP = 'TO_TIMESTAMP(%s)'
 
@@ -78,7 +78,7 @@ class BulkInsertMapper:
         'PositiveSmallIntegerField': NUMBER,
         'SmallAutoField': NUMBER,
         'SmallIntegerField': NUMBER,
-        'TextField': CLOB,
+        'TextField': NCLOB,
         'TimeField': TIMESTAMP,
     }