SPACE STRUCTURE OF BUILDING

PROBLEM TO BE SOLVED: To provide a space structure of a building, which enables a lower-story room and an intermediate room on an intermediate floor section to easily communicate with each other.SOLUTION: An intermediate floor section 3 is provided between lower-story and upper-story floor sections 1 and 2; a storage space 4 is provided between the intermediate floor section 3 and the lower-story floor section 1; an intermediate room 14 is provided on the intermediate floor section 3; and an open ceiling section 25, which continues from the lower-story floor section 1 to a ceiling height position of the intermediate room 14, is disposed in the state of facing the intermediate room 14. Since the open ceiling section 25 is disposed in a room 5a on the lower-story floor section in a plan view, the room 5a and the intermediate room on the intermediate floor section can easily communicate with each other.