Four lignans were isolated from the $CH_2Cl_2-soluble$ fraction of the stem barks of Kalopanax septemlobus and their structures were established as (-)-7R,8S-dehydrodiconiferyl alcohol (1), (-)-simulanol (2), (-)-secoisolariciresinol (3), and $({pm})-liriodendrin$ (4) based on the spectroscopic methods including MS, $^1H-$ and $^{13}C-NMR$ spectral data.