Abstract: Provided is an interior building material having a high decorative presentation effect and an easy replacing capability of an organic EL panel. An organic EL panel is interposed between a mounting member and a decorative member. The mounting member is fixed to a wall surface of a fixed structure. The organic EL panel is directly or indirectly attachable to and detachable from the mounting member with power supply capability from a side of the mounting member. The decorative member covers an emission surface of the organic EL panel with presentation of a first pattern during non-lighting and with expression of a second pattern different from the first pattern during lighting.

Abstract: Provided is an interior building material having a high decorative presentation effect and an easy replacing capability of an organic EL panel. An organic EL panel is interposed between a mounting member and a decorative member. The mounting member is fixed to a wall surface of a fixed structure. The organic EL panel is directly or indirectly attachable to and detachable from the mounting member with power supply capability from a side of the mounting member. The decorative member covers an emission surface of the organic EL panel with presentation of a first pattern during non-lighting and with expression of a second pattern different from the first pattern during lighting.

Abstract: There is provided a light-emitting-device-integrated building material having a simple structure that can be manufactured at a relatively low cost, and having high design flexibility. The light-emitting-device-integrated building material includes a decorative member having an outer surface and two or more surface emitting panels, and an inter-panel non-light emitting region is formed between a light emitting surface of one surface emitting panel and a light emitting surface of another surface emitting panel. In addition, when an average value of luminance per unit area of the inter-panel non-light emitting region in a front view is indicated as A1, and an average value of luminance per unit area of the projection plane overlapping region is indicated as A2, a value of X1 in the following expression is 55 or more and 3000 or less. X1=(A2/A1)*100?100.