PURPOSE: To construct a structure provided with highly strong circular arc type roof in which a large size window is arranged by fixing a plurality of arc type roof members, which are formed by bending corrugated boards, parallelly at certain intervals on both sides of two rod type connecting members and closing openings in the intervals by means of transparent material.

CONSTITUTION: Circular arc type roof members 3, each of which is formed by circularly bending a corrugated board in the direction perpendicular to the corrugated direction, are arranged parallelly at certain intervals so as to be fixed in two rod type connecting members 4 such as angle steels arranged along the upper part inside face. In openings 5 between the roof members 3, transparent or translucent boards such as glass boards are installed, and as a result, windows are formed. A size of the window can be freely regulated by widening the opening 5 between the roof members 3 or by closing the gaps in the upper part and the lower part of the window by means of a corrugated board with the same shape as the roof member 3. In a structure provided with the circular arc type roof formed in this way, reaction force beating external force works because of an action of the connecting member 4, so that sufficient bearing forth as a structure can be exhibited.