A straddle-type vehicle that prevents belt fluttering motion when the vehicle starts. A throttle opening degree sensor that detects an opening degree of a throttle is connected to and outputs to a controller a signal produced when the throttle opening degree switches from a closed state to an open state. When the vehicle starts from a standing state, the controller controls an actuator, according to the signal produced when the throttle opening degree switches from the closed state to the open state, to move a movable flange from a normal position in the standing state in a direction to narrow the groove width of a primary sheave.