PROBLEM TO BE SOLVED: To prevent outside light, which is brought into a room, from being visually recognized in the state of being separated into a plurality of colors, and to prevent an outside view from being multiply and visually recognized or visually recognized in the state of being separated into a plurality of colors, when an outdoor side is seen from an indoor side.SOLUTION: A first part 2, which has a plurality of grooves formed away from one another in a first direction on one surface and each elongated in a second direction, and a plurality of second parts 3, which are provided within the plurality of grooves, respectively, are provided. The ratio of between maximum and minimum values of intervals among the plurality of second parts 3 on one surface is 1.5 or more.
