The utility model discloses a clutch shell check tool for a manual transmission. The clutch shell check tool comprises a stepped circular ring flange-shaped body which is provided with a large circular section, a small circular section and a shoulder part. An axial positioning hole is formed in the middle of the body and is coaxial with the large circular section and the small circular section; the free end of the small circular section is provided with an axial positioning end face; the large circular section is provided with a measuring circumferential surface; and the diameter of the measuring circumferential surface is equal to the outer diameter of a largest clutch which is matched with a tested transmission. The maximum matching situation of a practical clutch and the clutch cavity of the manual transmission is simulated in the aspect of appearance through the clutch shell check tool having the structure and the status of a gap between the measuring circumferential surface and the inner wall of the clutch is observed so as to judge whether the clutch cavity is qualified or not. Therefore, the quality situation of the clutch cavity is detected qualitatively through a simple check tool and product detection efficiency of a production line is improved.