Abstract-Migrant employees at Palaran Port, Samarinda, encounter different social and cultural environment compared with their hometown, living and working in multiethnic social environment, and being separated from their head family and hometown. Referring those situations, the quality of their emotional maturity and social adjustment had high possibility for directing psychological well-being state. This research investigated the relationship between emotional maturity and social adjustment with psychological well-being of migrant employees at PT Pelabuhan Samudera Palaran Samarinda. The research was a population study and consisting of forty-two people as respondents. Three instruments were used in this research. The research was using multiple linear regression analysis to determine relationship between emotional maturity and social adjustment with psychological well-being. The result showed there was positive, strong, and significant relationship between emotion maturity and social adjustment to the psychological well-being of migrant employees at PT Pelabuhan Samudera Palaran Samarinda. Based on additional analysis, there was positive, moderate, and significant correlation between emotional maturity and psychological well-being, and also a positive, weak, and significant correlation between social adjustment and psychological well-being. While quality of emotional maturity was followed by social adjustment would lead to high psychological well-being state, the quality of emotional maturity wasn't followed by social adjustment would lead to moderate psychological wellbeing state and the quality of social adjustment that wasn't followed by emotional maturity would lead to weak psychological well-being state.