To provide a building allowing the effective use of a garage space.

A house 10 is provided with a garage 12 adjacent to a living space 11 of living rooms, a corridor, and the like. The garage 12 is an attached garage integrally provided at the house 10. The garage 12 is partitioned by fixed partition walls 13, 14, 15 and has the garage space 16. In this case, the garage space 16 is provided with guide rails 31, and a plurality of movable partition walls 21 movable along the guide rails 31. The garage space 16 is partitioned into a plurality of spaces by moving the plurality of movable partition walls 21.