To provide a game machine adapted to accurately prevent a fraudulent act for intentionally inducing a winning state.

The game machine includes a lever shaft portion SFT, a cover portion CVR covering around the lever shaft portion SFT and swinging together with the lever shaft portion SFT when making contact with the lever shaft portion SFT, and a sensor for detecting either of the lever shaft portion SFT and the cover portion CVR is operated earlier according to the contact condition between the lever shaft portion SFT and the cover portion CVR. On the basis of the detection result of the sensor, earlier operation of the lever shaft portion SFT is determined as a normal operation, and earlier operation of the cover portion CVR is determined as an abnormal operation.