PROBLEM TO BE SOLVED: To provide a disinfectant composition for a shoe sole disinfecting mat which can prevent a significant decrease in disinfecting power even if organic matter such as oil cake mixes in a disinfectant, particularly effective in disinfecting salmonella deposited on a shoe sole.SOLUTION: A disinfectant composition for a shoe sole disinfecting mat comprises a biguanide disinfectant and a di-long chain alkyl, di-short chain alkyl quaternary ammonium salt (the long-chain alkyl is a C8-C14 alkyl group and the short-chain alkyl is a C1-C3 alkyl group).SELECTED DRAWING: None【課題】消毒液中に油粕などの有機物が混入しても殺菌力の著しい低下を抑制できる、特に靴底に付着したサルモネラの殺菌消毒に有効な靴底消毒マット用殺菌消毒液組成物を提供すること。【解決手段】ビグアナイド系殺菌剤とジ長鎖アルキルジ短鎖アルキル第4級アンモニウム塩(長鎖アルキルは炭素数8~14のアルキル基であり、短鎖アルキルは炭素数1~3のアルキル基である)を含有する靴底消毒マット用殺菌消毒液組成物。【選択図】なし