The constituents of the leaf oils from ten ChineseLauraceaespecies (Cinnamomum glanduliferum(Wall.) Nees,Cinnamomum burmanniiCG. & Th. Nees,Lindera thomsoniiAllen,Lindera communisHemsl.,Lindera angustifoliaCheng,Machilus longipedicellataLecomte,Machilus yunnanensisLecomte,Neocinnamomum delavayi(Lecomte) H. Liou,Phoebe kwangciensisLiou,Phoebe nigrifoliaS. Lee et F. N. Wei) found in the southwestern parts of China were analyzed by capillary GC and GC/MS. The individual mono- and sesquiterpenes were identified by MS spectra comparing with those of authentic specimens. The identified components constituted 88.5–99.6% of these oils. These leaf oils were found to be rich in monoterpenes (43.2–94.9%) and sesquiterpenes (1.3–47.4%). Twenty-six to forty-five compounds have been characterized by GC/MS in each of the leaf oils of the tenLauraceaespecies.