PROBLEM TO BE SOLVED: To provide a sectional coffin which not only can be compactly housed, but also can be easily carried, and when assembling to use, can sustain high strength.SOLUTION: A sectional coffin comprises: a corrugated cardboard material 4 comprising a bottom board part 41 and side board parts 42, 42 which can stand around the bottom board part 41 and a cross-sectionally arch-shaped supporting board part 6 which has two pair-edges 6b, 6b which extend at least parallelly to each other in the longitudinal direction, and convexly projects upward from the two pair-edges 6b, 6b. The two pair-edges 6b, 6b of the supporting board 6 are arranged along the bottom board part 41 and a pair of corner parts 4a, 4a which is formed of the bottom board part 41 and the side board parts 42, 42 which stand from a pair of sides which face to each other on both sides of the bottom board part 41.COPYRIGHT: (C)2015,JPO&INPIT【課題】コンパクトな収納が可能であるばかりか、運搬が容易であり、組み立てて利用する際に高い強度を維持できる組み立て棺を提供すること。【解決手段】底板部41及び底板部41の周囲に立設可能な側板部42,42を備えた段ボール材4と、長手方向に少なくとも互いに平行に延びる二つの片縁6b,6bを有しており、二つの片縁6b,6bから上方に向けて湾曲状に突出する断面アーチ形状の支持板部6と、を有し、支持板部6の二つの片縁6b,6bは、底板部41と、底板部41と底板部41の両側で対向し合う一対の辺から立設される側板部42,42とにより形成される一対の角部4a,4aに沿って配置されている。【選択図】図1