The purpose of the present invention is to provide: a sweetness intensifier which is more natural and never damages the palatability of a food or beverage (the original taste of the food or beverage)； a flavor composition for intensifying sweetness, said flavor composition comprising a flavoring agent for foods and the sweetness intensifier； and a food or beverage containing the same. A sweetness intensifier which comprises as an active ingredient at least one member selected from among: (a) 4,5-epoxy-2E-decenal； (b) wine lactone； (c) methyl anthranilate； (d) phenyl acetic acid； and (e) ethyl tiglate.本發明係提供更自然而無損飲食品的適口性(飲食品原本的風味)之甜味增強劑、包含食品用香料及該甜味增強劑之甜味增強用香料組成物以及添加該等而得之飲食品。 一種甜味增強劑，其係以選自由(a)4,5-環氧基-2E-癸烯醛、(b)葡萄酒內酯、(c)鄰胺苯甲酸甲酯、(d)苯乙酸及(e)甘菊花酸乙酯所組成群組之至少1種作為有效成分。
