The volatile leaf and flower oils from Agastache rugosa (Fisch. et Mey) O. Kuntze were analyzed by GC and GC/MS and found to contain more than 40 mono- and sesquiterpenes, of which about 30 constituents have been identified. The oils are characterized by a high proportion of methyl chavicol (92.0% and 75.9% in the leaf and flower oils, respectively).