Provided is a hair-treatment composition containing: a first amphoteric surfactant having a structure represented by general formula (1) below at least one type of second amphoteric surfactant selected from the group consisting of fatty acid amide propyldimethylaminoacetic acid betaines, alkyldimethylaminoacetic acid betaines, N-acylaminoethyl-N-2-hydroxyethylaminocarboxylic acid salts and N-acylaminoethyl-N-carboxymethoxyethylaminocarboxylic acid salts fatty acid amide propyldimethylaminoacetic acid betaines, alkyldimethylaminoacetic acid betaines and an acidic amino acid. 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.
