The present study intended an approach to the attitude change by persuasion from the standpoint of developmental social psychology. More specifically, this study was designed to investigate the effects of the communicator attractiveness (i.e., attractiveness defined in terms of personality, attitudes, and other nonphysical features) and threats to freedom upon the resistance to persuasion. Three factors were involved in this experiment: the teacher attractiveness (attractive or unattractive), the degree of threat (high or low), and the subjects' age/school year (4th, 6th, or 8th grade). A2×2×3 factorial design was used and subjects were assigned to 12 conditions. Results indicated that attractive teachers induced positive responses to persuasion, while unattractive teachers induced the resistance to persuasion (negative emotional responses, aggression intent, negative evaluation of the message contents). The 8th graders displayed greater resistance to persuasion, whereas the 4th graders showed positive responses. A three factor interaction effect indicated that the 8th graders in an unattractive, high threat condition displayed the greatest resistance to persuasion. These findings were discussed in terms of developmental social psychology.