A sexual stimulator for oral sex is disclosed that includes a body (1) and a motor (8). The body (1) forms a clipping structure which can be clipped onto and worn on a mouth such that a fore part of the body (1) is snug inside a wall of the mouth while the rear part of the body (1) will snug the exterior face. The stimulator facilitates the user to clip, wear and take off the stimulator and a micro-circuit control chip (4) controls an output of a motor (8) 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.
