An aqueous composition having an excellent antiseptic effect is provided. An aqueous composition comprising a compound represented by Formula (1), wherein X represents a halogen atom, or a salt thereof, or a solvate of the compound or the salt thereof, and a quaternary ammonium surfactant.本發明所提供的水性組成物係具有優異的防腐效果。本發明的水性組成物，係含有：下示一般式(1)：[式中，X係表示鹵原子]所示化合物或其鹽或者該等的溶劑合物、與四級銨型界面活性劑。
