An object of the present invention is to provide an active ingredient for a wound healing agent that has high biocompatibility and an antimicrobial activity, as well as a wound healing accelerating activity, which can be applied to supply of a wound healing agent comprising a single active ingredient, which can be produced by a simple production process and production apparatus. According to the present invention, at least one compound selected from a protamine and pharmaceutically acceptable salts thereof is used as an active ingredient for antibacterial activity and wound healing acceleration of a wound healing agent.
