A turn signal cancelling device for a motorcycle includes turn signal cancellation control unit configured to automatically deactivate a second turn signal after a second predetermined time has passed or after the motorcycle has travelled a second predetermined distance since an activation the second turn signal. The turn signal cancellation control unit is configured to automatically deactivate the second turn signal in a case where the activation of the second turn signal is performed before a first predetermined time has passed or before the motorcycle has travelled a first predetermined distance since an activation of a first turn signal is performed when a vehicle speed is equal to or higher than a predetermined speed.