The present study developed a mediation model to examine how family supportive supervisor behaviors (FSSB) affect employees’ family-like employee-organization relationship (FEOR) which in turn affects employees’ organizational citizen behavior (OCB). A random sample of 211 Chinese fulltime employees completed online surveys, and to test the former assumptions M-plus software was used to conduct linear regression analysis. Results shows: 1) family supportive supervisor behaviors are positively related to family-like employee-organization relationship, 2) family-like employee-organization relationship is positively related to employees’ organizational citizen behavior, and 3) the relationship between FSSB and OCB was partly mediated by FEOR.