The present invention relates to a double-structure aerosol container for a two-agent type hair cosmetic, having an outer vessel and an inner bag to be housed in the outer vessel. An inner bag includes an inner layer and an outer layer both of which are formed of a polyolefin resin and an intermediate layer formed of a cyclic olefin copolymer or an amorphous polyester resin, thereby preventing an inner surface of the outer vessel from corrosion after storing at high temperature with the inner bag filled with a second agent containing hydrogen peroxide as a major ingredient and at least one of an organic acid or an organic acid compound.
