This research analyzed harmony between students inreligious difference in SMA Tiga Maret Yogyakartausing qualitative methode. This study indicate (1)Adaptation (adaptation) The adaptation function forstudents has occurred since the past and has beenharmonious. (2) Achievement of the goal (goalattainment) With harmonious students, the three MarchHigh Schools in Yogyakarta interact with each other (3)Integration (integration) In Three March High SchoolYogyakarta is the role of schools and religious teachersin regulating relations between students of differentreligions in order to maintain harmony in a system bothwithin the maupuan school environment in the widercommunity. (4) Latency (maintenance of patterns) Ininteractions between students of different religions inSMA Tiga Maret Yogyakarta Latency (maintenance ofpatterns) is divided into 3 parts, namely opening oneselfto the preservation efforts undertaken so that harmonybetween students of different religions is continued withattitudes be vigilant and finally improve, where whena conflict occurs in the name of a religious communitycausing disunity is an effort that is no less important.