Main Article Content
The Mentawai people's connection to the Uma (clan) makes them a social and economic group with promise. Currently, Mentawai's socio-cultural life is greatly influenced by an outside culture. The housing environment and government-built dwellings in Uma have changed, yet the relationship remains the same. In this economy, socializing is difficult. This study examined how foreign culture affected Mentawai habitation patterns and impacted socio-cultural capital. This qualitative sociology and anthropology research method collects data using observation, study documentation, and interviews. Data reduction, presentation, and verification are used in this work. Based on this study, mutually advantageous social ties called social capital can impact economic behavior. Mentawai culture in the Uma endures despite changes in the housing environment and government-built residences with a description of socio-cultural and economic ties. The Mentawai economy is still subsistence. In Madobag and Matototanan villages, South Siberut sub-district, Mentawai youngsters still grow bananas, taro, and sago for consumption, not sale. Trust them to the others, and the public's interest is their issue.