["Japanese Psychological Research, EarlyView. ", "\nAbstract\nAlthough it is known that followers' acceptance of leader–member exchange differentiation depends on their supervisors' ethics and altruism, it is yet to be confirmed whether differentiation in the support that supervisors provide to followers also depends on their supervisors' ethics and altruism. This study addressed this research gap by examining how servant leadership moderates the relationship between supervisor support differentiation and turnover intention. To test the hypotheses, we used secondary data from a cross‐sectional survey conducted by a social welfare corporation in eastern Japan, in which 34 directors and 676 staff from nursing homes completed a self‐reported questionnaire. We conducted a multi‐level analysis using hierarchical linear modeling. The results of the single slope analysis showed that higher perceived supervisor support differentiation (PSSD) is associated with the lower turnover intention of followers in organizations where supervisors reported more servant leadership behavior. These findings suggest that followers view PSSD as justified under servant leaders. This study provides evidence for the effectiveness of differentiated leadership as opposed to supportive leadership (which is the average approach).\n"]