diff --git a/app/src/main/java/jp/atled/agileworks/model/ApiSessionResponse.kt b/app/src/main/java/jp/atled/agileworks/model/ApiSessionResponse.kt
index 04e46625bae8c18e3d43989f3fb6ad890d4798f6..c1b258fd30e5c9da70b3b349ffaebf60a3360b46 100644
--- a/app/src/main/java/jp/atled/agileworks/model/ApiSessionResponse.kt
+++ b/app/src/main/java/jp/atled/agileworks/model/ApiSessionResponse.kt
@@ -21,8 +21,8 @@ data class ResponseSessionUnit (
         var code: String,
         var name: String,
         var main_unit: Boolean,
-        var section_role_code: String,
-        var section_role_name: String
+        var section_role_code: String?,
+        var section_role_name: String?
 )
 @JsonClass(generateAdapter = true)
 data class ResponseSessionRole (
diff --git a/app/src/main/java/jp/atled/agileworks/view/ui/DrawerMenu.kt b/app/src/main/java/jp/atled/agileworks/view/ui/DrawerMenu.kt
index 7d1ceefe504c4ecfe8c12df29346a09f4a89fd2f..103ef88a420a64b3f11046a9d2faad2f6dac1c27 100644
--- a/app/src/main/java/jp/atled/agileworks/view/ui/DrawerMenu.kt
+++ b/app/src/main/java/jp/atled/agileworks/view/ui/DrawerMenu.kt
@@ -71,7 +71,9 @@ class DrawerMenu {
                 for (unit in unitList) {
                     if (unit.main_unit) {
                         groupName = unit.name
-                        groupPartName = unit.section_role_name
+                        unit.section_role_name?.let { section_role_name ->
+                            groupPartName = section_role_name
+                        }
                         break
                     }
                 }