An improved polygonal cinerary urn structure includes an outer urn, an inner urn, an inner lid and an outer lid, the outer urn is a polygonal urn body with an opening at top, its opening end face forms an annular groove, the groove is internally embedded with a washer made of soft material, the washer has an annular shape and protrudes out of the opening end face, the inner urn is detachably disposed in the outer urn and provided with a housing trough that has an opening at top for accommodating ashes or remains, the inner lid sealingly covers the housing trough opening of the inner urn, one side of the outer lid is movably joined at opposite side of the outer urn, so as to allow the outer lid to flip on the outer urn in order to seal the inner urn and the inner lid inside. The above structure enables the cinerary urn to have efficacies of easy replacement of outer urn, cost savings, allowing to house foreign objects such as relics or drying agents, etc., and good sealing effect.一種多邊形骨灰罈結構改良包括一外罐、一內罐、一內蓋及一外蓋,該外罐為呈多邊形且朝上開口之一罐體,其之開口端面上具環狀之一槽溝,該槽溝中嵌設有軟性材質之一墊圈,該墊圈呈圈狀且凸出該開口端面,該內罐可分離地置設在該外罐中,且具朝上開口之一容槽可供容置骨灰或遺骨,該內蓋可封蓋住該內罐之容槽的開口,該外蓋的一側邊可擺動地結合在該外罐的相對側邊上,使該外蓋可在該外罐上翻蓋以供將該內罐及該內蓋密封於內部;藉由上述結構係使其具有便於更換外罐、節省成本、可容置遺物或乾燥藥劑等外物及密封效果佳之功效。10‧‧‧外罐11‧‧‧槽溝12‧‧‧墊圈20‧‧‧內罐21‧‧‧容槽22‧‧‧第一扣合部23‧‧‧立體圖案30‧‧‧內蓋31‧‧‧第二扣合部32‧‧‧凹槽40‧‧‧外蓋
