Racial problems are still not dimmed in Indonesia. One that is difficult to resolve is a matter of ethnic prejudice. Especially the most striking and historical background is the relationship between the Javanese-Chinese community. This study aims to reveal the arena of the formation of a multicultural society in Lasem, this can be a reference model for people with heterogeneous populations to foster diversity and tolerance. This research was carried out using qualitative methods with ethnographic design. The data source of this study is divided into 2 categories, namely Chinese families and Javanese families in Lasem, Rembang Regency, Central Java, Indonesia. The results of this study are: 1) the Chinese community in Lasem has merged into the social life of the Javanese community through daily activities that involve the cooperation of both such as sewing, clean the village, batik, and religious activities; 2) the environment forming a multicultural society in Lasem is quite unique because the settlements of Chinese and Javanese people live side by side, in contrast to the cases in the Chinatowns of Semarang,