To provide a Pachinko machine which can give a warning to a player when a situation arises which intentionally causes an eccentric cam for varying the height of the jump rail of a ball guidance device to stop.

In the Pachinko machine including the ball guidance device 25 permitting balls flowing in from a ball entrance to jump in a jump portion and flow into receiving openings 28 and 29 of a stage, the jump portion is provided as the jump rail 46 extending toward the stage 27 from the exit of a ball entrance 35, allowing the downstream side height of the jump rail to be varied by the eccentric cam 49, there are provided a detection means 51 for detecting the rotation of the eccentric cam 49, a rotation time measuring means for measuring time required for one rotation of the eccentric cam, a rotation time storage section for storing time measured by the rotation time measuring means, a decision control section for deciding whether or not a fraudulent act occurs by the value of the time stored in the rotation time storage section and a rotation confirmation signal from the detection means 51, and an announcing means for issuing an warning by a fraud announcement command signal from the decision control section.