The essential oil of Stachys pubescens Ten. growing wild in north-west of Iran was examined by GC and GC-MS methods. The yield of total volatiles was 0.06% (v/w). A total of 21 compounds were characterized in the essential oil. The main components of the oil were thymol (87.4%), trans-4-octene (4.8%) and linalool (1.6%). Other compounds present in appreciable amounts were nerol (0.7%), docosane (0.7%),α-terpineol (0.5%), and linalyl acetate (0.5%).