The present invention mainly provides a dental mirror structural improvement with replaceable lenses, which includes: a grip； an observation part mounted at one end of the grip, wherein the observation part is provided with a groove, and a through hole in communication with the groove is provided at a predetermined position of the observation part； and a lens, which is embedded and positioned in the groove. With the aforementioned components, a tool can be inserted into the through hole of the observation part to upwardly jerk the lens and thus separate the lens from the groove so as to achieve the effect of replacing the lens without discarding the entire dental mirror set, which is environmentally friendly, effective in cost reduction, and easy and convenient to assembly, thereby exhibiting excellent innovation, convenience and practicality.本發明主要係提供一種可更換鏡片之口腔鏡結構改良，其包含有：一握桿；一觀察部，設於該握桿之一端，該觀察部設有一凹槽，於該觀察部預設位置設有與凹槽相通之一穿孔；一鏡片，使該鏡片嵌設定位於凹槽；藉由上述構件，可利用一工具插入觀察部穿孔並頂掣鏡片脫離凹槽，即可達到更換鏡片之功效，無須拋棄整組口腔鏡，有效降低成本且環保，其組裝容易且便利，確具極佳創新及便利實用性者。
