The present invention provides a mask non-woven fabric capable of collecting viruses of various sizes as well as pollen, as well as fine particles, and a mask. A mask includes a nonwoven fabric for mask (10) composed of a nonwoven fabric (11) having chargeability and a nanofiber sheet (12) formed on the upper surface of the nonwoven fabric. The average fiber diameter of the nanofiber sheet is less than 1 μm, and the non-woven fabric is composed of polypropylene-based fibers and / or polyethylene-based fibers. [Selected figure] Figure 1
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