A saddle-riding type vehicle, comprising: an engine; a rear wheel; a transmission which is provided on a power transmission line which extends between the engine and the rear wheel; a clutch which is released or applied to disconnect or connect the power transmission line; an actuator which controls the release or application of the clutch; and a control unit which controls the actuator to release or apply the clutch, wherein the control unit includes: an engine stopped state detection portion which detects a stopped state of the engine; a gear selected state detection portion which detects a state in which any one of gears of the transmission is selected; a vehicle speed detection portion which detects a vehicle speed or a vehicle speed related value which is related to a vehicle speed; and characterized in that the control unit further includes a switch state detection portion which detects an ON state or an OFF state of a switch, the switch being a cutoff switch which permits the engine to operate in an OFF state and which does not permit the engine to operate in an ON state, wherein the control unit proceeds to a push start control mode when the engine stopped state detection portion detects a stopped state of the engine, and the gear selected state detection portion detects a state in which any one of the gears other than the neutral and reverse gears of the transmission is selected, and wherein in the push start control mode, the control unit applies the clutch to start the engine when the vehicle speed detection portion detects a predetermined vehicle speed or higher, and the switch state detection portion detects a change in state of the switch. an engine; a rear wheel; a transmission which is provided on a power transmission line which extends between the engine and the rear wheel; a clutch which is released or applied to disconnect or connect the power transmission line; an actuator which controls the release or application of the clutch; and a control unit which controls the actuator to release or apply the clutch, wherein the control unit includes: an engine stopped state detection portion which detects a stopped state of the engine; a gear selected state detection portion which detects a state in which any one of gears of the transmission is selected; a vehicle speed detection portion which detects a vehicle speed or a vehicle speed related value which is related to a vehicle speed; and characterized in that the control unit further includes a switch state detection portion which detects an ON state or an OFF state of a switch, the switch being a cutoff switch which permits the engine to operate in an OFF state and which does not permit the engine to operate in an ON state, wherein the control unit proceeds to a push start control mode when the engine stopped state detection portion detects a stopped state of the engine, and the gear selected state detection portion detects a state in which any one of the gears other than the neutral and reverse gears of the transmission is selected, and wherein in the push start control mode, the control unit applies the clutch to start the engine when the vehicle speed detection portion detects a predetermined vehicle speed or higher, and the switch state detection portion detects a change in state of the switch. an engine stopped state detection portion which detects a stopped state of the engine; a gear selected state detection portion which detects a state in which any one of gears of the transmission is selected; a vehicle speed detection portion which detects a vehicle speed or a vehicle speed related value which is related to a vehicle speed; and characterized in that the control unit further includes a switch state detection portion which detects an ON state or an OFF state of a switch, the switch being a cutoff switch which permits the engine to operate in an OFF state and which does not permit the engine to operate in an ON state, wherein the control unit proceeds to a push start control mode when the engine stopped state detection portion detects a stopped state of the engine, and the gear selected state detection portion detects a state in which any one of the gears other than the neutral and reverse gears of the transmission is selected, and wherein in the push start control mode, the control unit applies the clutch to start the engine when the vehicle speed detection portion detects a predetermined vehicle speed or higher, and the switch state detection portion detects a change in state of the switch. a switch state detection portion which detects an ON state or an OFF state of a switch, the switch being a cutoff switch which permits the engine to operate in an OFF state and which does not permit the engine to operate in an ON state, wherein the control unit proceeds to a push start control mode when the engine stopped state detection portion detects a stopped state of the engine, and the gear selected state detection portion detects a state in which any one of the gears other than the neutral and reverse gears of the transmission is selected, and wherein in the push start control mode, the control unit applies the clutch to start the engine when the vehicle speed detection portion detects a predetermined vehicle speed or higher, and the switch state detection portion detects a change in state of the switch.