The aim of this study is to explore the effect of creative self-efficacy (a very important component of personality) on different aspects of creativity under time pressure, competence pressure and evaluation pressure. Data were collected from 216 students among 3 classes in a middle school. The main results of the study are as follows: The effects of pressure on total creativity were, competence- enhanced, evaluation- decreased, time-no significant effect. Specifically, time pressure mainly enhanced fluency; evaluation pressure mainly enhanced originality; competence pressure enhanced both; the three pressure contexts all decreased flexibility significantly. There are significant differences on the change of flexibility among students with different creative self-efficacy under pressure contexts. Namely, students with middle score on creative self-efficacy have the least decline and those with lowest score on creative self-efficacy have the most.