PROBLEM TO BE SOLVED: To provide a preventive and therapeutic agent for stress intestinal injury.SOLUTION: A water excessive secretion depressant for an intestinal tract in a subject is characterized by containing a sterilized body of a Lactobacillus gasseri CP2305 strain (FERM BP-11331), a bacterial cell-treated product thereof or a mixture thereof as an active ingredient. A food additive, an animal additive, an animal feed and a pharmaceutical composition comprise this depressant.【課題】ストレス性腸障害の予防及び治療剤を提供する。【解決手段】ラクトバチルス・ガセリCP2305株(FERM BP-11331)の殺菌体、その菌体処理物、或いはその混合物、を有効成分として含有することを特徴とする、被験体の腸管での水分過剰分泌の抑制剤、この抑制剤を含む、食品添加剤、動物添加剤、動物飼料及び医薬組成物。【選択図】図5