This research has purpose to knowing the significant differences in cognitive learning outcomes student of Science Between Model Discovery learning with Conventional Learning. This type of research is a quasi experiment research with two-group posttest-only design. The sample in this research is class VA and VB SDN 07 Teladan. Technique data collection using test. Test the hypothesis in this study using the formula t-test. Based on the results showed that the average of the Discovery learning’s class was 85,3 and the Conventional Learning’s class average was 72,1. Based on the calculation of t test (t-test) on posttest obtained tcount (6,38) > ttable (1,66). This means that there is an differences in cognitive learning outcomes student of Science Between Model Discovery learning with Conventional Learning. Keyword : Learning Outcomes of Science, Model Discovery learning, Conventional Learning