A kind of improvement of bone ash jar structure, main system include outer altar body, the inner canister for setting the what outer altar body inside. Wherein, inner canister system what opening periphery is equipped with washer, and what opening stacked one has the bearing cup of plural open-work, so that the what bearing cup places desiccant, the lid what lid of inner canister is made to close Hou, constituted by washer airtight. It is placed in order to what inner canister with bone ash Hou of bag body accommodating, inner canister is placed in outside what in altar body, by the absorption of desiccant, bone ash is set to keep dry, reach airtight and shock-proof effect, to prevent cinerary urn because earthquake or external collision are collapsed, and then keeps cinerary urn more firm, if and when outer body breakage, being able to keep the complete of bone ash by the inner canister of sealing.一種骨灰罈結構之改良，主要係包含外罈體、置於該外罈體內部之內罐。其中，該內罐係於開口周緣設有墊圈，並於開口疊置一具有複數透孔之承杯，以供於該承杯放置乾燥劑，使內罐之蓋體於蓋合後，藉由墊圈構成氣密。俾於內罐置入以袋體容置之骨灰後，將內罐置入於外罈體內，藉由乾燥劑的吸附，使骨灰保持乾燥，達到氣密及避震效果，以防止骨灰罈因地震或外力碰撞倒塌，進而使骨灰罈更為穩固，且若外本體破損時，得以藉由密封之內罐保持骨灰的完整。
