A vehicle comprising: an engine including an engine internal space (S 1); an electric motor; a transmission that includes an input shaft, an output shaft, a gear train located at the input shaft and the output shaft, and a transmission internal space in which the gear train is located, and changes speed of rotational power transmitted from the engine and the electric motor to the input shaft and outputs the rotational power to a driving wheel; an oil pump driven by the rotational power from the engine and the electric motor; an oil passage including a common oil passage through which lubricating oil discharged from the oil pump flows, an engine lubricating oil passage extending from the common oil passage toward the engine internal space (S 1), and a transmission lubricating oil passage extending from the common oil passage toward the transmission internal space; and a variable throttle valve that changes a flow rate in the transmission lubricating oil passage, characterized in that: the vehicle is a hybrid vehicle; and the variable throttle valve increases an opening degree of the variable throttle valve in a mode transition in which a first traveling mode in which the hybrid vehicle travels by driving power of the engine transitions to a second traveling mode in which the hybrid vehicle stops the engine and travels by the driving power of the electric motor. an engine including an engine internal space (S 1); an electric motor; a transmission that includes an input shaft, an output shaft, a gear train located at the input shaft and the output shaft, and a transmission internal space in which the gear train is located, and changes speed of rotational power transmitted from the engine and the electric motor to the input shaft and outputs the rotational power to a driving wheel; includes an input shaft, an output shaft, a gear train located at the input shaft and the output shaft, and a transmission internal space in which the gear train is located, and changes speed of rotational power transmitted from the engine and the electric motor to the input shaft and outputs the rotational power to a driving wheel; an oil pump driven by the rotational power from the engine and the electric motor; an oil passage including a common oil passage through which lubricating oil discharged from the oil pump flows, an engine lubricating oil passage extending from the common oil passage toward the engine internal space (S 1), and a transmission lubricating oil passage extending from the common oil passage toward the transmission internal space; and a common oil passage through which lubricating oil discharged from the oil pump flows, an engine lubricating oil passage extending from the common oil passage toward the engine internal space (S 1), and a transmission lubricating oil passage extending from the common oil passage toward the transmission internal space; and a variable throttle valve that changes a flow rate in the transmission lubricating oil passage, characterized in that: the vehicle is a hybrid vehicle; and the variable throttle valve increases an opening degree of the variable throttle valve in a mode transition in which a first traveling mode in which the hybrid vehicle travels by driving power of the engine transitions to a second traveling mode in which the hybrid vehicle stops the engine and travels by the driving power of the electric motor. the vehicle is a hybrid vehicle; and the variable throttle valve increases an opening degree of the variable throttle valve in a mode transition in which a first traveling mode in which the hybrid vehicle travels by driving power of the engine transitions to a second traveling mode in which the hybrid vehicle stops the engine and travels by the driving power of the electric motor.