Abstract The essential oil of the aerial parts of the Wedelia chinensis Merrill was analyzed by GC and GC/MS. Nineteen compounds have been identified accounting for 94% of the oil. It was made up of mainly monoterpenes hydrocarbons (50.6%), sesquiterpenes hydrocarbons (22.5%), oxygenated sesquiterpenes (20.3%) with only small amounts of oxygenated monoterpenes (0.7%). The main constituents were found to be Î±-pinene (21.7%), spathulenol (20.3%) and limonene (14.3%). Key Word Index: Wedelia chinensis Compositaeessential oil compositionÎ±-pinenespathulenollimonene