A stimulus imparting device is provided with at least one of a first vibration device and a second vibration device, the first vibration device being provided to a vehicle seat (chair) where a driver (user) sits on and imparting a stimulus to a tendon part of the latissimus dorsi muscle of the driver, the second vibration device being provided to the vehicle seat and imparting a stimulus to a tendon part of the gluteus medius of the driver and a control device provided with a drive control unit for imparting a stimulus to the driver by performing drive control for at least one of the first vibration device and the second vibration device.