There is provided a fusion protein comprising albumin and retinol-binding protein (RBP), which can be used for preventing or treating fibrotic diseases. The fusion protein, in which albumin and RBP are bound together, is incorporated into stellate cells and induces phenotypic reversion from myofibroblast-like cells to quiescent fat-storing phenotype. Therefore, the fusion protein can be effectively used in preventing or treating fibrotic diseases occurring in the liver, pancreas, lung, or other organs.