This experiment was conducted to compare the conformity rates in the case of the suddenly formed consensus and in that of the gradually formed consensus in elective task. Moreover, the effects of public self-consciousness scores in conformity were tested. Subjects were 35 (10 males and 25 females) college students. The results were as follows. The conformity rates under the suddenly formed consensus condition were higher than that under the gradually formed consensus condition. However, follow ing the experiment, no difference was found between the suddenly formed consensus condition and the gradually formed consensus condition with regard to the amount of private acceptance. And High public self-consciousness scorers conformed more than low scorers.