In every day life, when we feel being deceived by someone, we pay attention to his/her facial expression and tone of voice. Three experiments were carried out by using undergraduate students. The purpose were (1) whether students can detect deceptive facial expressions from true ones, (2) whether difference may be found between men and women in detecting the deceptive facial expressions and in making disguise of deceptive facial expressions, (3) whether the results will be different or not in the following three conditions, 1) facial expression plus voice, 2) facial expression only, 3) voice only. In this experiment, "deception" was made by asking subjects to conceal negative feeling and falsely claimed to be enjoying themselves even when they watched the aversive films. Results showed that, (a) students could detect deceptive facial expressions, (b) there was no difference between men and women in detecting deceptive facial expressions, but there was difference between men and women in making disguise of deceptive facial expressions, and (c) no differences were found among the three conditions.