Abstract
A tactile sensor S comprises a grip portion unit 10 including a gripping portion 13 that is capable of coming into contact with a target object T and that allows the target object T to be observed from a surface thereof on the opposite side to a surface that comes into contact with the target object T, and a reflective portion 15 capable of reflecting an image of the target object T observed from the surface on said opposite side, and a base unit 30 having an imaging portion C capable of imaging at least one of at least a portion of the surface on the opposite side and at least a portion of the reflecting portion, wherein the grip portion unit 10 is configured to be removable from the base unit 30.