Disclosed herein is a device and method for measuring foreskin deformation caused by an external force. The device has a front holding element, a rear holding element, two extension elements, a length-measuring element and a pressure-measuring element. The lower ends of the front and the rear holding elements are pivotally connected with each other. The extension elements respectively extend from one side of the front holding element and the rear holding element. Each extension element has a remote end away from the front holding element and the rear holding element, in which the two remote ends are against each other. One end of the length-measuring element is coupled to the front or the rear holding elements. The pressure-measuring element is disposed on one of the remote ends.在此揭示一種用來量測個體包皮受力後的形變狀況之量測器及測量方法。所述包皮受力形變量測器,在結構上具有一前握持件、一後握持件、二延伸件、一長度量具、一壓力偵測單元。二延伸件分別由前、後握持件之一側延伸,且該二延伸件於遠離前握持件和後握持件之遠端彼此上下抵靠。長度量具與前或後握持件的上端耦接。壓力偵測單元設於任一遠端上。100‧‧‧包皮受力形變量測器110‧‧‧前握持件110U‧‧‧前握持件上端110L‧‧‧前握持件下端120‧‧‧後握持件120U‧‧‧後握持件上端120L‧‧‧後握持件下端150A、150B‧‧‧延伸件150AE、150BE‧‧‧遠端160‧‧‧長度量具170‧‧‧壓力偵測單元180‧‧‧顯示裝置190‧‧‧樞軸