Functional material-containing mask

[Problem] The purpose of the present invention is to provide, etc., a surgical mask with sufficient antibacterial properties, by uniformly manifesting on the surface of nanofibers a functional material with antibacterial and antiviral properties. [Solution] Achieved by a functional material-containing mask that is characterized by comprising nanofibers of 1-2,000 nm diameter and by including: at least one base polymer selected from a group comprising PVA, polylactic acid, fibroin, chitosan, chitin, nylon 6, nylon 6,6, nylon 9T, nylon 610, polyamide, polystyrene, polyacrylonitrile, polyethylene terephthalate, polyvinyl chloride, polyurethane, polyester, zein, collagen, and methylmethoxylated nylon; and at least one functional substance selected from a group comprising catechin polyphenols, polyphenols derived from persimmon tannins , grape seed polyphenols, soybean polyphenols, lemon peel polyphenols, coffee polyphenols, phenyl carboxylic acid, ellagic acid, and coumarin.