The present invention relates to a mousetrap comprising a body, wherein the body is formed by a plurality of sheets surrounding a plurality of mutually connected and retractable cages, one end of the body penetrating to form a front opening, the front opening pivoting a front door and setting a front a stop portion, the front door is a plate body and is selectively openable or closable toward the body, the front stop portion is disposed at a periphery of the body adjacent to the front opening, and the front door is selectively affixed to the front stop portion； the user The body can be telescopically placed to an appropriate size for use. When not in use, the mousetrap can be retracted to a minimum volume for storage to reduce the storage volume.本創作係一種捕鼠器，其包含一本體，本體為複數片材圍繞形成複數個相互連通且可伸縮的籠體，本體的一端貫穿形成一前開口，前開口樞設一前門及設置一前止擋部，前門為一板體且可選擇性地朝向本體內開啟或關閉，前止擋部設置於本體鄰近於前開口的周緣，前門可選擇性地貼靠於前止擋部；使用者可依需求伸縮本體至一適當大小擺放使用，當不使用時，可將捕鼠器縮至最小體積狀態收納，達到減少收納體積之目的。
