PROBLEM TO BE SOLVED: To provide a tunnel house solving the following problem: a conventional construction is unstable； vinyl stretched over the construction gets slack； and thereby the construction is finished in poor condition.SOLUTION: The tunnel house is structured as follows: forming recessions receiving crossbars at required parts of an arch 1 so as to easily fabricate the tunnel house, remove the slackness of the vinyl and cause no water hole； binding up engaged parts； setting screws to the bridging crossbar instead of making holes into the bridging crossbar； making holes into the required parts of the arch； and fastening the screws of the crossbar to the arch with nuts. The combination of both the recessions and the crossbars enables strong stability of the construction.【課題】従来の構造物は不安定でビニール張りがたるみ、仕上がりが悪いため、これらを解決する。【解決手段】アーチ１の必要部分に横棒を受け入れる窪みを作ることで、組み立てを容易にし、ビニールの弛みをなくし、水の溜まりもなくなる。各嵌め込み部分を縛る。横の渡し棒にあけるかわりに、横の渡し棒に螺子をセットして、アームの必要部分に穴をあけ、横棒のネジにナットで締め付ける。両方の組み合わせで強く安定させることが出来る。【選択図】図１
