A sexual stimulator for oral sex is disclosed that includes a body and a motor. The body forms a clipping structure which can be clipped onto and worn on a mouth such that a fore part of the body is snug inside a wall of the mouth while the rear part of the body will snug the exterior face. The stimulator facilitates the user to clip, wear and take off the stimulator and a micro-circuit control chip controls an output of a motor for different modes of vibration. In addition, the overall small size only occupies a little space within the mouth cavity without affecting the motions in the course of oral sex.
