Provided are a transfer film for forming a decorative layer on at least one surface of a film sensor, the transfer film including a temporary support and a coloring composition layer, the coloring composition layer including a black pigment or a white pigment, in which a content a (% by mass) of the black pigment or the white pigment in the coloring composition layer and a film thickness b (μm) of the coloring composition layer satisfy Expression 1; and a transfer film including a temporary support and a coloring composition layer, the coloring composition layer including a black pigment or a white pigment, in which a content a (% by mass) of the black pigment or the white pigment in the coloring composition layer and a film thickness b (μm) of the coloring composition layer satisfy Expression 1, 80>a×b>10  Expression 1.