Sex differences in beliefs among Japanese students about cues to deception were explored. 171 participants (91 women, 80 men) read a scenario in which a protagonist caused a fatal traffic accident and told a lie to avoid responsibility. Then participants rated how the protagonist's behaviors would change when lying. Women participants believed significantly more than men that a liar shows body cues (e.g., body touching, biting lips) associated with anxiety, and that a liar has unsuccessful impression management (e.g., fewer smiles, fewer facial expressions). Furthermore, the women's scores also indicated that a liar would increase the amount of information (e.g., longer response length, gestures) and show more nonfluent speech (e.g., speech disturbances, inconsistency of speech contents).