Provided are agents for preventing and treating skin aging, and agents fortreating scars that can exhibit sufficientefficacy. Skin aging prevention and treatment agents that comprise bFGF thatare administered intradermally or subcutaneouslyand are for treating skin aging and skin scar treatment agents that comprisebFGF which are administered intradermally orsubcutaneously and are for treating scarring of the skin are used. For theskin aging mentioned above, for example, wrinkles, spots,sagging, roughness and thinning of the skin and reduced skin viscoelasticitycan be cited as good examples. For the skin scarringmentioned above, for example, keloids, hypertrophic scars and scarcontractions can be cited as good examples.
