Psychological contract theory contend that supervisors as the contract maker. However, little is known about how supervisors impact on subordinate’s psychological contract. The study is designed to shed the light of the relationship between leader-member exchange and psychological contract fulfillment. From perspectives of resource allocation and social capital, we examined whether leader-member exchange increased acquired information, acquired resources and emotional support from supervisors and enhance psychological contract fulfillment and in turn increase organizational citizenship behaviors. We employed random coefficient model in structure model to analyze a sample of 228 supervisor-subordinate dyads obtained in financial industries. Results generally support our hypotheses, in that acquired information and acquired resources have significant mediating effects between leader-member exchange and psychological contract fulfillment, but emotional support does not. Further theoretical and practical implications are discussed.