The essential oils from different parts (roots, leaves, stem, buds and flowers) of Hogweed(Heracleum steveniiManden.) cultivated in St. Petersburg region, were collected by water distillation. They were analyzed by GC and GC/MS. Eighteen components were identified in the oils with octyl acetate (28–73%) being the major constituent. In addition to the oils obtained from the roots, stems and leaves are also rich in octyl octanoate (10–19%). The oil of each plant part had individual quantitative and qualitative composition.