This aqueous shampoo contains components (A)-(C): (A) an anionic surfactant (B) an organopolysiloxane represented by formula (1) wherein both ends have been modified with long chain alkyl groups and side chains with amino groups (R2R3 2)SiO-(R3 2SiO)x-(R3R4SiO)y-Si(R2R3 2) (1) (in formula (1), R2 represents a C12-30 straight or branched alkyl group, R3 represents a substituted or unsubstituted C1-6 monoradical hydrocarbon group, R4 represents a 3-aminopropyl group or N-(2-aminoethyl)-3-aminopropyl group, x is an integer of 1-2000, y is an integer of 1-100, and the nitrogen content is 0.31-2 mass%) (C) a cationized galactomannan and water.本發明之水性毛髮洗淨劑含有如下成分(A)~(C):(A)陰離子性界面活性劑、(B)下述通式(1)所表示之兩末端長鏈烷基-側鏈胺基改質有機聚矽氧烷、(R2R32)SiO-(R32SiO)x-(R3R4SiO)y-Si(R2R32) (1)(式(1)中,R2表示碳數12~30之直鏈或分支之烷基,R3表示經取代或未經取代之碳數1~6之1價烴基,R4表示3-胺基丙基或N-(2-胺基乙基)-3-胺基丙基,x為1~2000之整數,y為1~100之整數,含氮量為0.31~2質量%)(C)陽離子化半乳甘露聚糖、及水。