A motor comprising an armature, a plurality of slots provided on the armature in the circumferential direction around an axis of the armature, a first group of coils (A1-A5) wound on the armature between the slots by winding the wire around respectively predetermined slot groups of slots selected from the plurality of slots, and a second group of coils (B1-B5) wound on the armature between the slots by winding the wire around respectively predetermined slot groups of slots selected from the plurality of slots, a commutator that rotates together with the armature, a plurality of segments provided on the commutator in the circumferential direction around an axis of the commutator, and an armature winding having a plurality of windings each formed by three of the segments, two coils and an equalizing wire, and including at least a first unit winding and a second unit winding formed between the armature and the segments, wherein: the first unit winding is defined by a first segment, a second segment and a third segment of the plurality of segments, a coil of the first group and a coil of the second group for the first unit winding diametrically opposed to each other, and a first equalizing wire, the first segment defines a starting point of the first unit winding, the coil of the first group for the first unit winding and the coil of the second group for the first unit winding are connected in series in this order by winding the wire from the first segment to the second segment, the first equalizing wire is connected from the second segment to the third segment that defines an endpoint of the first unit winding, the second unit winding is defined by the third segment, a fourth segment and a fifth segment of the plurality of segments, a coil of the first group and a coil of the second group for the second unit winding diametrically opposed to each other, and a second equalizing wire, the third segment defines an endpoint of the first unit winding and also defines a starting point of the second unit winding, the second equalizing wire is connected from the fourth segment to the fifth segment that defines an endpoint of the second unit winding, and the coils (A1-A5) of the first group of subsequently connected unit windings are disposed in a position shifted by one slot in the circumferential direction around the axis of the armature, the coils (B1-B5) of the second group of subsequently connected unit windings are disposed in a position shifted by one slot in the circumferential direction around the axis of the armature, each of the endpoint segments of the windings serves as the starting point segment of the next winding, characterized in that the coil of the second group for the second unit winding and the coil of the first group for the second unit winding are connected in series in this order by winding the wire from the third segment to the fourth segment. the first unit winding is defined by a first segment, a second segment and a third segment of the plurality of segments, a coil of the first group and a coil of the second group for the first unit winding diametrically opposed to each other, and a first equalizing wire, the first segment defines a starting point of the first unit winding, the coil of the first group for the first unit winding and the coil of the second group for the first unit winding are connected in series in this order by winding the wire from the first segment to the second segment, the first equalizing wire is connected from the second segment to the third segment that defines an endpoint of the first unit winding, the second unit winding is defined by the third segment, a fourth segment and a fifth segment of the plurality of segments, a coil of the first group and a coil of the second group for the second unit winding diametrically opposed to each other, and a second equalizing wire, the third segment defines an endpoint of the first unit winding and also defines a starting point of the second unit winding, the second equalizing wire is connected from the fourth segment to the fifth segment that defines an endpoint of the second unit winding, and the coils (A1-A5) of the first group of subsequently connected unit windings are disposed in a position shifted by one slot in the circumferential direction around the axis of the armature, the coils (B1-B5) of the second group of subsequently connected unit windings are disposed in a position shifted by one slot in the circumferential direction around the axis of the armature, each of the endpoint segments of the windings serves as the starting point segment of the next winding, characterized in that the coil of the second group for the second unit winding and the coil of the first group for the second unit winding are connected in series in this order by winding the wire from the third segment to the fourth segment.