A brush motor includes a commutator fixed to a shaft, a pair of brushes in a sliding contact with a circumferential surface of the commutator, a first and a second torsion springs respectively pushing and pressing the pair of the brushes to sides of the commutator, a supporting plate attached with the springs, and a screw supporting the supporting plate. The supporting plate 10 is configured to be rotatable about the screw as a center or a supporting position by the screw is capable to be changed, in such a way that the pushing pressures by the springs to the pair of the brushes become to be equalized. Thus, insulation between the brushes can be secured while noise reduction and durability are improved.