IN-VEHICLE-MOUNTED STRUCTURE

An in-vehicle-mounted structure in which a drive unit is mounted on a vehicle equipped with an engine. The drive unit includes a drive motor and a transmission. The drive motor and the transmission are connected in series in a width direction of the vehicle. An exhaust pipe of the engine is extended to pass adjacent the transmission in the longitudinal direction of the vehicle. The transmission includes a coolant flow channel through which flows coolant for cooling lubricating oil that lubricates a speed change mechanism inside the transmission. The coolant flow channel is positioned to face the exhaust pipe.