Past research about perceptual reversals of ambiguous figures indicated that the superior parietal lobule is involved in perceptual reversals. To investigate the rTMS effect over the right superior parietal lobule on perceptual reversals, three kinds of trials, i.e., Target, Control and No-TMS trials were performed in the present study. In the Target trial, rTMS was applied over the right superior parietal lobule. In the Control trial, rTMS was applied over the right posterior temporal lobe. In the No-TMS trial, no TMS was applied over the subject's skull. The inter-reversal times of perceptual reversals between these three trials were compared. It was suggested that the right superior parietal lobule plays a critical role in perceptual reversals of ambiguous figures.