PROBLEM TO BE SOLVED: To provide an indoor air treatment device having the function of purifying and regenerating polluted indoor air without relying on ventilation, and arranged inside an indoor division or in a part of a surface of the indoor division. SOLUTION: This indoor air treatment device has an indoor air suction port arranged in an indoor division surface, a clean air blowoff port arranged in the indoor division surface or the other indoor division surface, and an air duct for making the suction port and the blowoff port arranged inside the indoor division communicate with each other, and is formed so that among construction face materials arranged in layers on the indoor division surface, and constituting the division surface, a construction face material arranged in the innermost layer is at least one kind of deodorant construction building material.
