Water distilled oil of leaves and flowers of various Tanacetum spp. were analysed by GC/MS. 19–34 coumpounds, representing 70–93% of the oils in flower of Tanacetum parthenium (L.) and in various aerial parts of Tanacetum balsamita L. were revealed. The major constituents were borneol, bornyl acetate, camphor, camphene and 1,8-cineole.