This study aims to determine (1) the results of students misconception analysis on mathematics subjects on the concept of geometry fields, (2) know the percentage of students who misconception on the concept of geometry using Three-Tier Test. Data collection testicles include interview guides and Three-Tier Test questions. Data analysis was done descriptively quantitative. The results showed that 24.1% of students mastered the concept, while the remaining 6.2% of students guessed or did not believe in the answers, 22.2% of students did not understand the concept and 47.5% of students experienced misconceptions. Students experiencing the lowest misconception on the subconscious solve the problem of triangle proposition and line segment 36,5% and the highest misconception experienced by the student on subconcept describes symmetry and angle 59,5%. While the sequence of the third category of misconception highest to lowest on the concept of Geometry Field that occurred is as follows: pure misconception (22%), false positive (17.9%), and false negative (7.6%).