PURPOSE: To easily change the environment of a children's room and effectively utilize a wall surface, providing the special function on the wall surface.

CONSTITUTION: A wall surface member 1 for room inside consisting of the combination of a plurality of panel members 3-17,... is installed in a demountable manner, in a superposed state on the already existing inside room wall surface. Each of the panel members 3-17,... is formed to each module, and has a prescribed dimension. A magazine rack 18 is installed on the panel member 4 among these panel members, and the panel member 7 is used as a white board, and a shelf 23 is installed on the panel member 8. A display case 24 is installed on the panel member 9, and a mirror 25 is installed on the panel member 10, and the panel member 11 is used as magnet board.