Abstract Essential oils isolated by steam distillation from the aerial parts of Thymus pubescens Boiss. et Kotschy ex Celak, before flowering and full flowering stage, were analyzed by capillary GC and GC/MS. Among the 37 compounds identified, the major components were carvacrol (64.8% and 48.8%), thymol (11.9% and 13.9%), Î³-terpinene (6.1% and trace) and p-cymene (2.9% and 12.7%) before flowering and full flowering stage, respectively.