Patent ID: 8549957

Claim:
A rotation angle detecting apparatus to detect a rotation angle of a rotating member, the rotation angle detecting apparatus comprising: a housing, the rotating member being disposed so as to be rotatable relative to the housing; a fixing member to fix a magnet to the rotating member; and a sensor, fixed to the housing, to detect a rotation angle of the magnet, the rotating member including an abutting part with which the magnet abuts in a direction of a rotation axis of the rotating member, and a supporting part that faces the abutting part with the magnet interposed therebetween to support the fixing member located between the magnet and the supporting part, the fixing member pressing the magnet against the abutting part by coming into contact with the supporting part and the magnet without allowing a section contacting the supporting part and a section contacting the magnet to overlap with each other in the direction of the rotation axis, and the fixing member pressing the magnet against the abutting part by being rotated in one direction around an axis that is parallel to the rotation axis in a space sandwiched between a plain surface including the abutting part and a plain surface including the supporting part.