A new polypeptide (RGHP)was isolated from red Ginseng root hair by Rp-HPLC. It was identified as tritriacont peptide on basis of analysis of amino acid composition and determination of molecular weight by SDSPAGE and high performance size-exclusion chromatography. The activities of RGHP were studied by means of tissue culture and immunoassay,and compared with ginsenosides.