Objective: To investigate the suppressive effects of immature dendritic cells derived from donor bone on mice allogenic teeth rejection. Methods: immature dendritic cells derived from mice bone marrow were generated with 50 U/ml granulocyte-macrophage colony-stimulating factor; the phenotype were analyzed by flow cytometry. 2×106 imDC per mouse were administered to the recipients through tail vein 7 days before allogenic teeth transplantation. The suppressive effects of imDC on transplantation rejection were observed through histological section. Results: The infiltration of lymph cell and Inflammatory reaction in allogenic teeth transplantation group were reduced after administration of imDC to the recipients.Conclusion:The allogenic teeth rejection could be lessened by imDC.