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The cooperative learning model is a teaching strategy that emphasizes attitudes or behaviors in working or helping among others in the structure of regular cooperation in groups, consisting of two or more people. The problem in this study is whether the application of the STAD cooperative learning model influences students mathematics learning achievement. This study uses the experimental method, using the experimental group of the STAD type cooperative learning model while the control group uses conventional/ordinary learning models. The population in this study was all students of SMA 1 Cibatu class 1, while the samples were two randomly selected classes from 6 existing classes. The instrument is used in this study is a set of description type test questions. To test the hypothesis, the Mann-Whitney test is used and from the test results it is obtained that Zhitung is -3.47 and Ztabel is 2.575 with α = 1%. It turns out that with the -Ztabel < Zhitung < Ztabel H0 is in the rejection area, it means that there is a significant difference in final ability between the experimental group and the control group. So it can be concluded that there is the influence of the STAD cooperative learning model on students mathematics learning achievement.