The present study was designed to investigate the effects of justification of verbal threats from teachers on psychological reactance among elementary school and junior high school students. Three independent variables were used: justification of threat (justifiable threat and unjustifiable threat), students' grades (fourth, sixth, and eighth grades) and their gender (male and female). A 2 x 3 x 2 factorial design was used, and 180 students participated as subjects. Three types of negative response to verbal threats (affective, verbal, and behavioral reactance) were measured as dependent variables. The main results were as follows: (1) Unjustifiable threat produced greater affective, verbal, and behavioral reactance than did justifiable threat. (2) Students reported greater reactance in affective scale than did in verbal or behavioral one, and they reported greater reactance in verbal scale than did in behavioral one.