A power tool comprising: a motor comprising a rotation shaft portion rotatable about a rotation axis; a housing accommodating therein the motor; a power transmission portion configured to receive a rotation force of the rotation shaft portion and to transmit a driving force based on the rotation force; a driven portion configured to be driven by receiving the transmitted driving force; a bearing rotatably supporting the rotation shaft portion; and a shock absorbing portion comprising: an elastic body; and wherein the rotation shaft portion is supported by the housing so as to be movable relative to the housing in an axial direction of the rotation axis, wherein the bearing comprises an outer race and an inner race which are rotatable relative to each other, wherein the elastic body is configured to be elastically deformed by movement of the rotation shaft portion in the axial direction, wherein the rotation shaft portion is fixed to the inner race, characterized in that: the shock absorbing portion comprises a plate interposed between the bearing and the elastic body; that the bearing is supported by the housing so as to be movable integrally with the rotation shaft portion in the axial direction; that the elastic body urges the plate toward the outer race; and that the plate is in contact with the outer race and is away from the inner race. a motor comprising a rotation shaft portion rotatable about a rotation axis; a housing accommodating therein the motor; a power transmission portion configured to receive a rotation force of the rotation shaft portion and to transmit a driving force based on the rotation force; a driven portion configured to be driven by receiving the transmitted driving force; a bearing rotatably supporting the rotation shaft portion; and a shock absorbing portion comprising: an elastic body; and wherein the rotation shaft portion is supported by the housing so as to be movable relative to the housing in an axial direction of the rotation axis, wherein the bearing comprises an outer race and an inner race which are rotatable relative to each other, wherein the elastic body is configured to be elastically deformed by movement of the rotation shaft portion in the axial direction, wherein the rotation shaft portion is fixed to the inner race, characterized in that: the shock absorbing portion comprises a plate interposed between the bearing and the elastic body; that the bearing is supported by the housing so as to be movable integrally with the rotation shaft portion in the axial direction; that the elastic body urges the plate toward the outer race; and that the plate is in contact with the outer race and is away from the inner race. an elastic body; and wherein the rotation shaft portion is supported by the housing so as to be movable relative to the housing in an axial direction of the rotation axis, wherein the bearing comprises an outer race and an inner race which are rotatable relative to each other, wherein the elastic body is configured to be elastically deformed by movement of the rotation shaft portion in the axial direction, wherein the rotation shaft portion is fixed to the inner race, characterized in that: the shock absorbing portion comprises a plate interposed between the bearing and the elastic body; that the bearing is supported by the housing so as to be movable integrally with the rotation shaft portion in the axial direction; that the elastic body urges the plate toward the outer race; and that the plate is in contact with the outer race and is away from the inner race. the shock absorbing portion comprises a plate interposed between the bearing and the elastic body; that the bearing is supported by the housing so as to be movable integrally with the rotation shaft portion in the axial direction; that the elastic body urges the plate toward the outer race; and that the plate is in contact with the outer race and is away from the inner race.