Disclosed is a cosmetic preparation for hair constituted as a hair dye or an agent for bleaching or removing dye from hair comprising a plurality of agents, which is applied to the hair in the form of a foam obtained by mixing a powdered agent and a liquid agent and creating a foam through shaking. Also disclosed is a method for using the cosmetic preparation for hair comprises first step for forming a cosmetic preparation for hair in the form of a foam by mixing a powdered agent and liquid agent of a cosmetic preparation for hair and creating a foam through shaking and second step for manually applying to the hair the resulting cosmetic preparation for hair in the form of a foam.