The utility model relates to a dog mouth opener, the main structure of which comprises at least one base part for fitting the dog's face epidermis, at least one curved face formed by extending one end of the base part and supporting the dog's mouth corner epidermis, and at least one elastic limiting part formed by extending the curved face away from one end of the base part and for clamping the inner wall of the dog's mouth.According to the above structure, the elastic hook tool composed of the base part, the curved surface part and the elastic limit part is used to pull back the skin of the dog's mouth corner to expose the teeth so as to facilitate the user to clean the teeth. Because the base part, the curved surface part and the elastic limit part are all around the outer edge of the mouth corner, the fixing effect is good, and the saliva will not fall off due to the wet and slippery condition, and it is more suitable for rope binding tools. The utility model has the advantages of excellent operability and safety.本新型為有關一種狗用張口器，主要結構包括至少一供貼合狗之臉部表皮的基部、至少一由該基部一端延伸形成並供抵持狗之嘴角表皮的曲面部、及至少一由該曲面部背離該基部一端延伸形成並供卡固狗之口腔內壁的彈性限位部。藉上述結構，利用基部、曲面部及彈性限位部所組構而成之彈性勾狀工具，將小狗嘴角的皮膚向後拉開，露出牙齒以利使用者清潔牙齒，並因基部、曲面部及彈性限位部係共同環繞抵持於嘴角外緣，故固定效果良好，不會因唾液濕滑而脫落，更可配合束繩類之工具輔助固定張口器，藉此使本新型具有絕佳之操作性及安全性。
