Two new compounds, melanochromone and 2-ethoxyl-2-(4-hydroxyphenyl)ethanol, were isolated from the whole plants of Melanosoiadum pimpinelloideum H. Boiss. The known compounds isolated were 1-(4-hydroxyphenyl)-1,2-ethanediol, tymine, cimifugin, umtatin, bergenin, daucosterol and stigmasterol. Their structures were determined on the basis of spectral data. Two new compounds, melanochromone and 2-ethoxyl-2- (4-hydroxyphenyl) ethanol, were isolated from the whole plants of Melanosoiadum pimpinelloideum H. Boiss. The known compounds isolated 1- (4- hydroxyphenyl) -1,2-ethanediol , tymine, cimifugin, umtatin, bergenin, daucosterol and stigmasterol. Their structures were determined on the basis of spectral data.