Patent ID: 8915124

Claim:
A surface texture measuring apparatus for measuring a surface texture of a subject of measurement based on swing amounts of a measurement arm, said apparatus comprising: a detector having a pair of styli and further having the measurement arm supported so as to be able to swing with an axis of rotation as a supporting point, and a detection unit configured to detect the swing amounts of the measurement arm; a posture switching mechanism configured to switch a posture of the measurement arm between a posture in which the measurement arm is swung in one measurement direction and a posture in which the measurement arm is swung in another measurement direction; and a speed control mechanism configured to control a switching speed of posture switching of the measurement arm to a preset speed when the posture of the measurement arm is switched by the posture switching mechanism, wherein: each stylus of the pair of styli projects opposite each other from a tip of the measurement arm in a said measurement direction of the measurement arm.