This paper discusses the life of Arabs in Palu Bay in 1830-1930. There are two aspects that must be investigated, namely how the Arabs network in Palu Bay and how they contribute to the community in Palu Bay. This paper used historical method by using oral sources and written sources. Oral sources are through interviews with Arab families in Palu while written sources were archives of official colonial government publications, manuscripts, books, journals and scientific works. The findings in this study are: First, Arabs in Palu Bay have kinship networks and trade networks with other regions in the archipelago such as Makassar, Manado, Bolaang Mongondow, Buol, Tomini Bay, Java, Kalimantan and Singapore. They also formed a kinship network by marrying local noblewomen. Second, the gait and contribution of Arabs in Palu Bay can be seen from their activities in the field of da'wah and Islamic symbols, politics, and the economy. Their presence has left a cultural heritage, including mosques, schools, and maulid ceremonies.