Cross-border economic activities are often done by people of Skouw Sae Village, Muara Tami District, Jayapura City to Wutung Village, Vanimo, Papua New Guinea. This study attempts to analyze the functions of economic activity in this community. Data were processed using qualitative analysis. The results of this study found seven functions of cross-border economic activities. First, to meet nutritional needs of the family. Second, to meet reproductive needs for family continuity. Third, to meet the needs for comfort and welfare of wife's family. Fourth, to meet safety needs. Fifth, to meet the needs for relaxation. Sixth, to meet mobility needs. Seventh, to meet the needs for growth. It also meets the needs for activities and systems of ideas related to the fulfillment of seven needs. In conclusion, the functions of cross-border economic activities of Skouw Sae Village are to meet basic, institutional and symbolical needs of local people.