Academic procrastination particularly happens to college students who are working on their thesis is assumed to be influenced by the attitude of their perfectionism. The purpose of this study is to determine how perfectionism has influence on the academic procrastination of the students who are doing thesis at the Faculty of Psychology UIN Sunan Gunung Djati Bandung. The study had conducted on the population of students who are working on a thesis in total 38 people. The design used was a non-experimental design with causality method. Measuring instruments used the Almost Perfect Scale Revised from Snaley (1992) and Procrastination Student Assessment Scale developed by Solomon and Rothblum (1984) with some adaptations. Technical analysis of the data using simple regression analysis with the result that the determination coefficient of influence perfectionism to academic procrastination is R2 = 0.065. The results of the t test, t = 1.582 < table = 1.684, so it can be concluded that there is no significant effect of perfectionism to the academic procrastination of students who are working on a thesis.