Abstract The essential oil was isolated by hydrodistillation from the aerial parts of Nepeta pogonosperma Jamzad et Assadi in 1.70% w/w yield. The oil was analyzed by capillary GC and GC/MS. Among the 28 compounds identified, the major components were 4aa,7a,7aβ-nepetalactone (57.6%), 1,8-cineole (26.4%) and β-pinene (3.7%). Key Word Index: Nepeta pogonosperma Lamiaceaeessential oil composition4aα-7β-7aβ-nepetalactone1,8-cineole