[Problem] To provide a powder hair dye composition having excellent miscibility with a liquid medium such as water, excellent operability at the time of application to hair, and excellent temporal stability during long-term storage. [Means for Resolution] A powder hair dye composition including the following component (A) to component (C), the content of the component (A) at the time of use being 1 to 5 mass%: (A) sodium percarbonate； (B) sodium carboxymethyl cellulose； (C) a thickener other than the component (B).
