A motor mounted on a vehicle includes a housing; a shaft rotatably supported by the housing via a bearing; a rotor fixed to the shaft; a stator; and a detector that detects a rotational speed of the rotor. The stator includes: a stator core disposed at an outer circumferential side of the rotor to face the rotor in the radial direction along which the rotor and the stator are arranged to be adjacent each other; and a stator coil being wound around the stator core, the stator coil having a stator coil end formed at one end side of the stator coil in the axial direction. The detector is disposed between the stator coil end and the bearing that supports both ends of the shaft, and at least a part of detector is disposed to be overlapped in the radial direction with the stator coil end and the bearing.