Volatile constituents obtained from crushed fruits and aerial parts of Grammosciadium pterocarpum Boiss. (Apiaceae) by microdistillation were analyzed by gas chromatography (GC) and GCâmass spectrometry (GCâMS) systems, simultaneously. Fifteen components comprising 99.5% of the volatile oil of the fruit and twenty components comprising 97.4% of the volatile oil of the aerial parts were identified. The main constituents of the fruit volatiles were found to be linalool (68.4%) and Î²-pinene (22.0%), whereas caryophyllene oxide (55.1%) and Î²-caryophyllene (15.3%) were found to be major constituents in the volatiles of the aerial parts.