The invention relates to an improved structure of a medicine tank, which comprises a medicine tank and an easy opening cover which is arranged at the bottom of the medicine tank. Therefore, by using the design of the easy opening cover, the heating agent at the bottom of the medicine tank has better sealing and moisture-proof effect, and it is also convenient for the user to open and remove it when using.本創作為一種藥劑罐改良結構，其包括藥劑罐及易開蓋，該易開蓋係設於該藥劑罐之底部。藉此，利用易開蓋的設計，可讓藥劑罐底部的發熱劑有較佳的密封及防潮效果，且於使用時亦方便使用者開啟移除之。
