Objective: To study chemical constituents of Cudrania tricuspidata . Method: The 80% ethanolic extract of Cudrania tricuspidata was analyzed by column chromatography of silica gel and Sephadex LH 20. Result: Six compounds were extracted from the ethanolic extract part. Conclusion: They were elucidated as syringaresinol, schizandrin, gomisin A, gomisin H, ? sitosterol and ? sitosterol 3 O ? D glucopyranoside respectively. Among them, syringaresinol, schizandrin, gomisin A, gomisin H were obtained from this species for the first time.