Essential oil constituents of the major chemotypes of Perilla frutescens, such as perillaldehyde [PA] type, elsholtziaketone [EK] type, perillaketone [PK] type, citral [C] type, perillene [PL] type and phenylpropanoid [PP] type, were examined by GC/MS. Seventy-one compounds were detected and identified.