An anti-obesity composition containing fresh red pepper extract as an active ingredient is provided to give an effect of suppressing obesity and to be conveniently taken by almost removing the bitter taste. An anti-obesity composition contains 2 to 100% by weight of fresh red pepper extract, 20 to 80% by weight of corn silk extract, 0.5 to 10% by weight of Pueraria root extract and 0.5 to 10% by weight of garlic extract. A health supplementary food contains 0.1 to 20% by weight of the anti-obesity composition. The fresh red pepper extract is obtained by the steps of: washing unripe green pepper or fresh red pepper with water and dehydrating it; putting into a container containing water or oil; heating the container at 50 to 110deg.C for 20 to 30min; collecting and cooling the vapor; and filtering the condensed liquid under reduced pressure. The corn silk extract is obtained by the steps of: washing corn silk with water and dehydrating it; heating the corn silk with water at 80 to 90deg.C for 6 to 8hr; heating