The present invention is directed to compositions comprising, as an active ingredient, a green tea extract. The composition is effective for treatment or prevention of obesity, and the like are utilized can be varied in the pharmaceutical art such as this food. [Selection Figure Figure 3本発明は、緑茶抽出物を有効成分として含有する組成物に関する。前記組成物は、肥満等の治療又は予防に効果的であり、これを食品及び医薬分野等において多様に活用可能である。【選択図】図3