PROBLEM TO BE SOLVED: To provide a hair detergent having an appropriate viscosity, a good foaming property with a fine foam quality having a good slidability on washing the hair, a smooth feeling on rinsing and also a good low temperature stability.SOLUTION: This aqueous hair detergent contains a 5 to 30 mass% alkyl ether sulfate expressed by general formula (1): RO-(PO)m(EO)nSO3M (1) [wherein, R is an alkyl having an 8 to 24 mean number of carbon atoms PO is a propyleneoxy group (m) is the 0