PROBLEM TO BE SOLVED: To provide a simple assembly structure which is easy in assembly and excellent in strength, and low in costs of manufacturing, transportation, and storage.SOLUTION: A simple assembly structure 1 is assembled into a tunnel shape by connecting a plurality of rectangular panel members 10 in an arch shape through connection piece members 20 and connecting a plurality of rows of the connected panel members 10 in a depth direction D. The connection piece member 20 is installed in a plate piece shape having a length shorter than that of one side of the panel member 10 and fixed over side edge wall parts 12a of the adjacent panel members 10 arranged in the arch shape to connect the panel members 10 to each other. A reinforcing connection piece member 20 is provided which is fixed over the adjacent connection piece members 20 connecting the panel members 10 to each other, thereby reinforcing the arch shape.【課題】組み立てが容易で強度に優れるとともに製造、運搬及び保管コストが低い簡易組立構造体を提供することにある。【解決手段】複数の矩形状のパネル部材１０を、連結片部材２０を介在させてアーチ状の形状に連結すると共に奥行方向Ｄに複数列を連結してトンネル状に組み立てられる簡易組立構造体１であって、連結片部材２０が、パネル部材１０の一辺の長さよりも短い板片状に設けられ、前記アーチ状に配される隣り合うパネル部材１０の側縁壁部１２ａに渡って固定されることでパネル部材１０同士が連結され、パネル部材１０同士を連結した隣り合う連結片部材２０に渡って固定されることで前記アーチ状の形状を補強する補強用の連結片部材２０を備える。【選択図】図２
