Provided is a two-part hair dye composition, including a first part containing an alkali agent, a second part containing hydrogen peroxide, and a non-aerosol type foamer container for discharging a mixture solution of the first part and the second part as foam, in which the mixture solution contains the following components (A) and (B): (A) 0.1 to 10% by mass of a nonionic surfactant, and (B) 0.1 to 5% by mass of a cationic surfactant, and the mass ratio of the component (A) to the component (B) (content of the component (A)/content of the component (B)) is 1 to 100.
