Provided is a hair-treatment composition containing an amphoteric surfactant having a structure represented by general formula (1) below, and a sugar nonionic surfactant. In general formula (1), R1 represents an alkyl group the carbon number of which is 6 to 20 R2 represents a methyl group, an ethyl group, or a hydroxyethyl group R3 represents a methyl group, an ethyl group, or a —CH2COOH group and n is an integer from 1 to 3.
