Abstract: A number of parallel slats (3) of a blind (1) comprise transparent base boards (3a), and graphic pattern forming regions (16) are provided on the respective slats (3) by a paint or the like. When the slats (3) are simultaneously tilted at a predetermined angle, the graphic pattern forming regions (16) on the respective slats (3) are combined with each other to block the light coming from behind the blind (1) or reflect the light coming from behind from the side of the observer, thereby producing a significant graphic pattern (18) such as a portrait on a blind surface (17). The significant graphic pattern (18) can be recognized when the observer views the blind surface (17) or the shadow projected onto a wall or floor. The significant graphic pattern (18) creates an excellent interior atmosphere.