A daylighting film (1) according to an aspect of the present invention includes a first base (2) that has optical transparency, multiple daylighting units (3) which are formed on at least a first surface (2a) of the first base (2) and each of which has the optical transparency, an opening space (9) which is provided between each of the multiple daylighting units (3), and a mark (5) which is provided on at least any one of the first surface (2a) side of the first base (2) and the second surface (2b) side that is opposite in direction to the first surface (2a), and which indicates information relating a daylighting film (1).