To provide a device for stopping an internal combustion engine and slowly bringing a motorcycle to a stop when an abnormal operation that generates noise is performed.

A motorcycle control device for noise prevention is configured such that a motorcycle body including a clutch, a neutral display lamp and an emergency stop switch, includes a speed sensor, an internal combustion engine rotation sensor, an engagement/disengagement sensor of the clutch, a neutral sensor, a lamp for displaying presence/absence of abnormality of the device, an auxiliary abnormality display lamp and an electronic computer; and, when an electronic computer determines a speed of the motorcycle to be set above a predetermined value from information of the speed sensor, determines a number of rotations of the internal combustion engine to be set at a predetermined value from information of the internal combustion engine rotation sensor, determines the clutch to be in a disengagement state from information of the engagement/disengagement sensor of the clutch, or in a neutral state from information of the neutral sensor, and determines the state to have continued for a predetermined period or more, the electronic computer operates the emergency stop switch to stop the internal combustion engine, and, when the emergency stop switch is operated, the device is restarted when the electronic computer confirms the stop of the motorcycle from information of the speed sensor.