To provide a low radiation hormesis mask for an effect for which a conventional mask cannot function, that is, an effect of killing or weakening pathogenic bacteria that are to invade a body inside the mask for protection, by an effect by radiation and radiation gas radiated by radiation rocks, that is, a low radiation hormesis effect, and for a purpose of contributing to health recovery by remarkable improvement of immune strength by the low radiation hormesis effect, in addition to functions that the conventional mask has, by fixing, inside the conventional mask, a special filter made of nonwoven fabric with excellent air permeability in which a powder made by powder processing rocks or the like that emit low radiation existing in the natural world is kneaded and added.

A structure is such that a nonwoven fabric antibacterial immunization filter with a low radiation hormesis effect, for which kneading processing is executed to the nonwoven fabric or the like, is fixed and held inside a conventionally used mask.