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Social exchange theory evokes the maximization of one’s personal interests or benefits when one is engaging in a relationship. The central tenant of social exchange theory focuses on the notion of reciprocity. Perceived organizational support (POS) should elicit the norm of reciprocity and employees would feel they are obligated to help organizations to achieve goals. The main objective of this study is to examine the mediating effect of POS between organizational justice and supervisory support with affective commitment. More precisely, five hypotheses were tested using a sample of 207 academics of Malaysian private universities. Partial least squares path modeling was utilised to assess the measurement and structural model. In this study, organizational justice is envisaged as a multi-dimensional construct which comprises distinct variables namely-procedural justice, distributive justice and interactional justice. Supervisory support and affective commitment are unidimensional constructs. POS was found to be a mediator for the relationship between organizational justice and supervisory support with affective commitment. The findings of this study were expected to shed light on the scant literature of POS especially its mediating role for the relationship between organizational justice, supervisory support, and affective commitment.