A motor for selecting a gear of a transmission installed in a vehicle, or for driving a clutch, the motor comprising: a rotor arranged to rotate about a rotation axis; a stator core including a plurality of teeth; a plurality of coils, each defined by a conductor wire wound around a separate one of the teeth; and a busbar unit arranged to supply a drive current to each coil; wherein the busbar unit includes: a plurality of coil connection busbars(31,32,33), each including a conductor wire connection portion(313,323,333) connected with an end portion of the conductor wire; and a busbar holder made of an insulating material and arranged to support the plurality of coil connection busbars(31,32,33); each conductor wire connection portion(313,323,333) and the corresponding end portion of the conductor wire is welded to each other; characterized in that the busbar holder includes a plurality of sensor holders, each holding a separate one of a plurality of sensors arranged to detect a rotational position of the rotor; the busbar unit further includes a plurality of sensor connection busbars (41, 42, 43, 44, 45, 46, 51, 52, 53) arranged to supply a drive current to the sensors held in the respective sensor holders, or to output an output signal from the sensors; the busbar holder is arranged to support the plurality of sensor connection busbars (41, 42, 43, 44, 45, 46, 51, 52, 53); at least one of the plurality of sensor connection busbars (41, 42, 43, 44, 45, 46, 51, 52, 53) includes a plurality of sensor connection portions (446, 447, 448) each directly connected with a terminal of a separate one of the sensors; and each sensor connection portion (446, 447, 448) and the terminal of the corresponding sensor are welded to each other. a rotor arranged to rotate about a rotation axis; a stator core including a plurality of teeth; a plurality of coils, each defined by a conductor wire wound around a separate one of the teeth; and a busbar unit arranged to supply a drive current to each coil; wherein the busbar unit includes: a plurality of coil connection busbars(31,32,33), each including a conductor wire connection portion(313,323,333) connected with an end portion of the conductor wire; and a busbar holder made of an insulating material and arranged to support the plurality of coil connection busbars(31,32,33); each conductor wire connection portion(313,323,333) and the corresponding end portion of the conductor wire is welded to each other; characterized in that the busbar holder includes a plurality of sensor holders, each holding a separate one of a plurality of sensors arranged to detect a rotational position of the rotor; the busbar unit further includes a plurality of sensor connection busbars (41, 42, 43, 44, 45, 46, 51, 52, 53) arranged to supply a drive current to the sensors held in the respective sensor holders, or to output an output signal from the sensors; the busbar holder is arranged to support the plurality of sensor connection busbars (41, 42, 43, 44, 45, 46, 51, 52, 53); at least one of the plurality of sensor connection busbars (41, 42, 43, 44, 45, 46, 51, 52, 53) includes a plurality of sensor connection portions (446, 447, 448) each directly connected with a terminal of a separate one of the sensors; and each sensor connection portion (446, 447, 448) and the terminal of the corresponding sensor are welded to each other. a plurality of coil connection busbars(31,32,33), each including a conductor wire connection portion(313,323,333) connected with an end portion of the conductor wire; and a busbar holder made of an insulating material and arranged to support the plurality of coil connection busbars(31,32,33); each conductor wire connection portion(313,323,333) and the corresponding end portion of the conductor wire is welded to each other; characterized in that the busbar holder includes a plurality of sensor holders, each holding a separate one of a plurality of sensors arranged to detect a rotational position of the rotor; the busbar unit further includes a plurality of sensor connection busbars (41, 42, 43, 44, 45, 46, 51, 52, 53) arranged to supply a drive current to the sensors held in the respective sensor holders, or to output an output signal from the sensors; the busbar holder is arranged to support the plurality of sensor connection busbars (41, 42, 43, 44, 45, 46, 51, 52, 53); at least one of the plurality of sensor connection busbars (41, 42, 43, 44, 45, 46, 51, 52, 53) includes a plurality of sensor connection portions (446, 447, 448) each directly connected with a terminal of a separate one of the sensors; and each sensor connection portion (446, 447, 448) and the terminal of the corresponding sensor are welded to each other.