A dental tool extension structure includes a tool body having a working head and a handle with one end connected to the working head, a grip element connected to the handle and slides between a first position and a second position along the handle, and a positioning device disposed between the tool body and the grip element and provided for fixing the grip element to any position between the first and second positions, thereby, such a structure can adjust the length of the dental tool freely.本發明提供一種牙科工具延長結構,包含:一工具本體,具有一工作頭部以及一柄部;該柄部之一端連接該工作頭部;一握持件,連接於該工具本體之柄部,而沿著該柄部一於一第一位置與一第二位置間滑動;以及一固定裝置,設置於該工具本體與該握持件之間,用以將該握持件固定於該第一位置與該第二位置之間的任一位置。具體功能係提供專業牙醫師,於看診時,得自由調整牙科工具長度據以方便診療作業。10‧‧‧工具本體11‧‧‧工作頭部12‧‧‧柄部13‧‧‧穿孔14‧‧‧螺孔15‧‧‧擋垣20‧‧‧握持部21‧‧‧軸孔30‧‧‧固定裝置31‧‧‧迫緊固定件311‧‧‧頭部312‧‧‧螺桿313‧‧‧凹槽32‧‧‧迫緊移動件321‧‧‧穿孔322‧‧‧連接部323‧‧‧迫緊部
