The main purpose of this empirical study was to investigate the effect of using jigsaw technique of cooperative learning method on sixth grade students' achievement in teaching computer literacy lesson. Fifty five sixth grade students from two class of a public school in Turkey participated in this study. With a quasi-experimental pretest-post-test research design, one class assign to experimental and the other to control group randomly. While the experimental group (n=33) instructed with jigsaw technique of cooperative learning method, the control group (n=22) followed the regular curriculum with traditional instructional methods. Both groups were administered to an achievement test, as pre, post and retention test. A t-test analysis was used to analyses research data. The results of post-test indicated that students in experimental group had significantly higher achievement scores than students in the control group. However, no significant difference found between the groups on retention test scores.