The present invention provides an antiobesity composition comprising extract of Melissa as an active ingredient, use of Melissa extract, and a method for suppressing obesity using the composition. Also, the present invention provides an antiobesity composition comprising extract of Melissa and extract of Mori Folium as active ingredients, use of a mixture of Melissa extract and Mori Folium extract, and a method for suppressing obesity using the composition. Further, the present invention provides an antiobesity composition comprising extract of Melissa, extract of Artemisia and extract of Mori Folium as active ingredients, use of a mixture of Melissa extract, Artemisia extract and Mori Folium extract, and a method for suppressing obesity using the composition. When the present compositions are administrated into genetically obese mice or high fat diet-induced obese mice, the present compositions reduced body weight, body fat and gonadal fat, and reduce blood cholesterol level and obesity-related blood glucose level. Also, the present compositions suppress hypertrophy of adipocytes, and inhibit the accumulation of lipid in the liver by reducing the size and number of lipid vacuoles. Furthermore, in human clinial trial the present compositions show that body weight, PIBW, body fat, especially visceral fat, apolipoprotin B concentration, ratio of total cholesterol/HDL cholesterol and ratio of LDL cholesterol/HDL cholesterol are significantly decreased, and atherogenic index is improved and muscle mass is increased. Thus, the present compositions can be usefully applied as antiobesity composition for reduction of body weight and suppression of abdominal fat, particularly, visceral fat.