diff --git a/src/main/scala/com/nulabinc/backlog/r2b/mapping/RedmineMappingHeader.scala b/src/main/scala/com/nulabinc/backlog/r2b/mapping/RedmineMappingHeader.scala
index 9929f82..8b01f7d 100644
--- a/src/main/scala/com/nulabinc/backlog/r2b/mapping/RedmineMappingHeader.scala
+++ b/src/main/scala/com/nulabinc/backlog/r2b/mapping/RedmineMappingHeader.scala
@@ -21,8 +21,7 @@ object RedmineMappingHeader {
     val headers: Seq[String] = Seq(
       "Redmine user name",
       "Redmine user display name",
-      "Backlog user name",
-      "Backlog mapping type"
+      "Backlog user name"
     )
   }