This experiment was conducted to compare the conformity rates in the sudden formed consensus and in the gradually formed consensus in an elective task. The effect of public self-consciousness scores on conformity was also tested. Subjects were 35 (10 males and 25 females) junior college students. The results were as follows: The conformity rate in the sudden formation condition was higher than that in the gradual formation condition. However, after the experiment the amount of private acceptances in the sudden formation condition and the gradual formation condition were not significantly different. Moreover, high scorers of self-consciousness conformed more than low scorers.