This research aims to examine the profile of the mathematical proving ability of students in Abstract Algebra courses. The method of this research is included in this type of descriptive research. The subjects of this study were 3 students who studied Abstract Algebra courses from the high, medium and low mathematical proofing ability group. The results showed that students with high ability and are having the ability to read mathematical proofs and perform mathematical proofs. As for the ability to criticize proof by adding, reducing or reconstituted a mathematical proof for each group of students is still not visible.