In this study, the content validity of mathematics sub test of the transition from primary to secondary education exam (TEOG) which has six main subjects in 20132014 education year is analyzed. Content validity refers whether the test actually measures the related structures or performance or not. For this purpose, the itemobjective congruence of 40 items of mathematics sub test in two semesters is evaluated. Mathematics has three examinations in a semester and TEOG is considered is second of these, and its content prepared to contain all the objectives gained until the examination day. Because of this reason it is important to fulfill content validity in TEOG like any other examination. To identify content validity in TEOG, expert opinions has been received and according to these opinions the content validity ratio and the content validity indexes calculated with Lawshe technique. With the light of these findings, four items at the first term TEOG mathematics examination and only one item at the second term TEOG mathematics examination identified to remove from these tests. After removing these items from both of the examination it is observed that both tests fulfill required criteria. In addition to this, it can be said that the second term TEOG mathematics test has higher content validity then first term one.