To manufacture a private-room space instantaneously by simple operation, and to use the space as a dressing room.

A private-room space S covered with the side face walls 1a and ceiling wall 1b of a tent sheet 1 is formed by piercing the pointed lower end sections 2a of each support 2 to a ground surface G under the state that the intervals of these supports 2 are widened so that each side face wall 1a of the tent sheet 1 is spread. The intervals of the supports 2 are kept and the shape of the private-room space S is held surely by installing supporting members 3 extending over the upper end sections 2b of the supports 2.