The present invention addresses the problem of providing, for a face mask, a mixed-fiber nonwoven fabric for which productivity as well as quality are high. This mixed-fiber nonwoven fabric for a face mask mainly contains a synthetic fiber and a cellulose fiber. The synthetic fiber has a fineness of 0.4 to 0.8 dtex. The synthetic fiber has a card pass-through coefficient within the range of 8 to 50, the card pass-through coefficient being determined by equation (1) below. The content of the synthetic fiber in the whole mixed-fiber nonwoven fabric for a face mask is 20 to 80% by mass, and the content of the cellulose fiber therein is 80 to 20% by mass.本發明的課題在於提供一種生產性優異且品質亦優異的面罩用混合纖維不織布。一種面罩用混合纖維不織布，其以合成纖維與纖維素系纖維為主成分，且所述面罩用混合纖維不織布中，所述合成纖維的纖度為0.4 dtex～0.8 dtex，所述合成纖維的下述式（1）所示的梳棉通過係數為8～50的範圍內，相對於所述面罩用混合纖維不織布整體的合成纖維的含量為20質量%～80質量%，纖維素系纖維的含量為80質量%～20質量%。
