PROBLEM TO BE SOLVED: To provide a novel body temperature-elevating agent having a proper body temperature-elevating effect.SOLUTION: The present invention provides a body temperature-elevating agent comprising as the active ingredient the bacterial cell of strain SBC8803 (Deposit No.: FERM BP-10632) belonging to the genus Lactobacillus brevis, or the treated product thereof.【課題】適度な体温上昇効果を有する新規の体温上昇剤を提供すること。【解決手段】ラクトバチラス・ブレビス(Lactobacillus brevis)に属するSBC8803(受託番号:FERM BP-10632)菌株の菌体又はその処理物を有効成分として含有する体温上昇剤。【選択図】なし