Patent ID: 8359908

Claim:
A surface texture measuring device, comprising: a rotation driving device configured to rotate a measured substance; a roughness detector including a detector main body and a stylus provided displaceably at a tip of the detector main body and configured to come in contact with a measurement face of the measured substance; and a detector driving device including a detector holder configured to hold the roughness detector, and being configured to drive the detector holder in a direction of bringing the detector holder close to or away from the rotation driving device, wherein the roughness detector has at least one skid provided at the tip of the detector main body and in the proximity of the stylus and configured to come in contact with the measurement face of the measured substance, and the roughness detector outputs displacement of the stylus based on the skid as an electric signal, wherein the detector holder includes a guide member driven by the detector driving device, a slide member configured to hold the roughness detector and provided slidably in a displacement direction of the stylus to the guide member, and an urging member configured to urge the slide member so that the at least one skid always comes in contact with the measurement face of the measured substance, wherein the at least one skid includes a pair of skids sandwiching the stylus and projecting in a projection direction of the stylus, and wherein a tip of one of the at least one skid of the pair of skids deviates in the displacement direction of the stylus from a tip of the other skid.