The main purpose of this study is to determine the self-efficacy perceptions of classroom teachers' towards computers. The data of the research, where the screening model was used, were obtained with the "Computational Perception of Self-Efficacy Perception Scale" applied to 308 class teachers working in the provinces of Bahçelievler and Bağcılar, İstanbul. Variance analysis techniques have been used for variables, seniority, and ways of learning to use computer in predicting self-efficacy perceptions of primary school teachers and t test has been used for the gender variable. The results of the research indicate that the teachers' self-efficacy perceptions are high, and their experience with the teaching profession, that is their seniority, changes their self-efficacy perceptions. Nevertheless, the gender of classroom teachers and the ways in which they learn to use a computer do not differentiate their self-efficacy perceptions. In order to increase the proficiency perceptions of the classroom teachers towards the computer in the direction of the results obtained, proposals have been made about pre-service and inservice training studies and researches to be done.