In this study, we examine the relationship between supervisor gender, the adoption of HR practices, and employee commitment. Based on leadership theories arguing that female supervisors are more focused on employee needs than male supervisors, we suggest that female supervisors are more likely to adopt HR practices that address employee needs. Using social exchange arguments, we predict that this in turn leads to higher affective commitment among employees. We test our theoretical predictions using three waves of the German Linked Personnel Panel (LPP). Our results indicate that female supervisors promote personnel development practices (DP) more than male supervisors, which has a positive impact on employees’ affective commitment to the organization. We find no statistically significant effect of a female supervisor on the provision of family-friendly work practices (FFWP). We discuss the implications of these findings and suggest avenues for future research.