The community of Singkawang constituted the multi cultural society, in religion, ethnic, and culture. Historically Singkawang society was able to maintain inter religious harmony. The associative social interaction seemed to be potential to support the harmony in the society. Based on the paradigm of functional-structural, society was assumed as an organic system having inter-relatednes between one organ and another in order to maintain the existence of the society. Social interaction within Singkawang society was developed by the the interaction in the cyrcle of family, neighbourhood, economical activities, religious leaders, and the relation within culture and tradition. Inspite of this the relation between the element of society is still cosmo­politant, on which the society members are less active in developing community harmony. *** Masyarakat Singkawang adalah masyarakat yang terdiri atas berbagai kelompok suku bangsa dan agama. Secara historis, masyarakat Singkawang mampu mem­pertahankan harmoni antar agama. Model interaksi sosial yang bersifat asosiatif tampaknya potensial untuk mendukung harmoni di dalam masyarakat. Ber­dasarkan paradigma fungsional-struktural, masyarakat diasumsikan sebagai sistem organik yang memiliki huungan antar bagiannya untuk mempertahankan masyarakat. Interaksi sosial di dalam masyarakat Singkawang dikembangkan melalui interaksi di dalam lingkup keluarga, lingkungan sekitar, aktifitas ekonomi, para pimpinan agama, dan hubungan di dalam lingkup budaya dan tradisi. Meskipun demikian, hubungan antar unsur masyarakat masih kosmopolitan, yang di dalamnya anggota masyarakat kurang aktif dalam mengembangkan harmoni masyarakat.