To provide a fermented soybean milk-containing beverage that has a reduced discomfort flavor (for example, sourness) derived from fermented soybean milk, and has high temporal stability suitable for long-term storage.SOLUTION: A fermented soybean milk-containing beverage contains fermented soybean milk obtained by fermenting a soybean milk material with lactic acid bacteria, and first enzyme-treated soybean milk obtained by hydrolyzing soybean milk with peptide bond hydrolase.【課題】発酵豆乳に由来する不快な風味（例えば、酸味）が抑制され、かつ長期保存に適する経時安定性の高い発酵豆乳入り飲料を提供すること。【解決手段】乳酸菌により豆乳原料を発酵させた発酵豆乳と、ペプチド結合加水分解酵素により豆乳を加水分解させた第１の酵素処理豆乳と、を含有する、発酵豆乳入り飲料。
