PROBLEM TO BE SOLVED: To provide a fungus body or the like of a lactic acid bacterium effective in intraoral disease prevention, improvement, treatment or the like.SOLUTION: One of the present invention is at least one fungus body, fungus body culture or extract thereof, among lactic acid bacteria of Lactobacillus rhamnosus OG4 strain (NITE P-1558) and Lactobacillus rhamnosus OG5 strain (NITE P-1559).