This study aims to: 1) Identify the social capital in the venture with Purse seine fishing in Aertembaga Bitung City. 2) Describe the aspects of social capital in businesses with Purse seine fishing in Aertembaga Bitung City. The method used in this research is a survey method. Data collection techniques focused on in-depth interview technique (in-depth interview). In-depth interviews, will use language and terms that apply in the community with a family approach, so as to understand the context of the social capital impact business continuity Purse seine. The data were then processed and analyzed descriptively. Descriptive analysis method is the method used to analyze data in ways that describe or depict the data that has been collected as it is without intending to apply to general conclusions or generalizations.Results of research and discussion can be concluded: 1) Social capital on respondents Aertembaga Purse seine in Bitung: trust, social norms and social interaction. 2) Social capital plays an important role in efforts to purse seine fishing in terms of access to capital resources, human resources and sales of catches, in social interactions rely on the trust that has been built to form a social norm.