PROBLEM TO BE SOLVED: To provide an indoor structure of a building having a high degree of freedom in arranging plants. An indoor structure 10 of a building is supported by a first floor 61, a stepped portion 60 including a second floor 62 provided at a position lower than the first floor 61, and a second floor 62. And a planting member 70 made of a material capable of forming a hole 70A for arranging the plant. [Selection diagram] Fig. 4【課題】植物の配置の自由度が高い建築物の室内構造を提供する。【解決手段】建築物の室内構造１０は第１床６１、および、第１床６１よりも低い位置に設けられる第２床６２を含む段差部６０と、第２床６２に支持され、植物１００を配置するための穴７０Ａを設けることのできる材料によって構成される植栽用部材７０とを備える。【選択図】図４
