Patent ID: 7607520

Claim:
An electric disk brake for a vehicle, said electric disk brake comprising: an electric motor in which a brush, that comes into slide contact with a commutator provided on an output shaft rotatably supported in a motor housing, is held by a brush holder secured to the motor housing; a rotation angle detection sensor for detecting a rotation angle of the electric motor, the rotation angle sensor disposed inside of the motor housing; and a brake piston driven by the electric motor being slidably fitted to a caliper body, wherein a detected portion to be detected by the rotation angle detection sensor is provided on the output shaft in the motor housing, the detected portion circumferentially disposed from the rotation angle detection sensor relative to an axis of the output shaft in the motor housing; a bottomed cylindrical yoke having a plurality of magnets on an inner periphery thereof; a lid plate that is connected to the yoke to cover an opening formed therein and which holds the brush holder between itself and the yoke, the lid plate having a bearing housing integrally provided thereon for housing a motor bearing; and a motor bearing disposed in the bearing housing for rotatably supporting the output shaft therein; wherein the rotation angle detection sensor is housed and secured in a recess provided in the brush holder so as to be covered with the lid plate.