A mousetrap.The system comprises a cage body.The opposite ends of the cage body are provided with openings.The opening is hinged with a cage door.The cage door is provided with a rotating arm.The cage body is provided with a trigger plate forming a seesaw structure.The shaft of the trigger plate is fixedly connected with a fastener.The fastener has a hook head.The hook head can be hooked to a pressure bar.For clamping the rotating arms,In this way,Through a relatively arranged opening,To create a sense of visual penetration,To make it easier for mice to enter the cage,In addition, the trigger board is used to immediately connect the fastener.Releasing the cage doors to close the openings,And it has strong catching ability.Fast capture response,Easy to operate.一種捕鼠器,其係包含有一籠體,該籠體之相對兩端皆設有開口,該開口係樞設有籠門,該籠門設有旋轉臂,而該籠體內係設有形成蹺蹺板結構之觸發板,該觸發板之轉軸係固接有卡扣件,該卡扣件係具有鉤頭,該鉤頭係可勾抵一壓桿,以供夾壓該等旋轉臂,藉此,透過相對設置之開口,以產生視覺穿透感,俾使老鼠更容易進入該籠體內,另再藉由該觸發板即時連動該卡扣件,釋放該等籠門關閉該等開口,而具有捕捉能力強、捕捉反應快速、操作簡單的特點。