The present invention provides an electronic ruler for measuring the wound size of a patient. The technical means comprises a housing, a measuring tape, a display panel, a scanner, a control unit, a battery unit and a keypad module. The housing is provided with an opening at one end the measuring tape is arranged in the housing and has one end extending from the opening to the outside the display panel, which is a touch panel, is provided on one side of the housing the scanner is provided at the other end of the housing the control unit is provided inside the housing and electrically connected to the display panel and the scanner the battery unit is disposed inside the housing and electrically connected to the control unit the keypad module is provided at the lateral side of the housing and electrically connected to the control unit. Accordingly, this invention helps nursing staff save time in writing records and systematically organize the wound data, thereby not only improving work efficiency, but also helping the nursing staff clearly observe the patients healing condition based on the recorded wound data, , so that the patient is able to receive better caring.本發明在於提供一種用於量測病患傷口大小的電子尺具。其技術手段包括:殼體、捲尺、顯示面板、掃描器、控制單元、電池單元及按鍵模組;所述殼體,其一端設有開口;所述捲尺,其設於殼體內,且一端能從開口處伸出殼體外;所述顯示面板,其是為觸控面板、並設於殼體的一側面;所述掃描器,其設於殼體的另一端;所述控制單元,其設於殼體內,且與顯示面板、掃描器電連接;所述電池單元,其設於殼體內、且與控制單元電連接;所述按鍵模組,其設於殼體側面處、且與控制單元電連接。據此,本發明能幫助護理人員節省書寫時間,並將傷口數據做系統性的整理,不僅提升工作效率,亦能助於護理人員由傷口紀錄,清楚觀察病患的癒合情形,以得到更好的照護。1‧‧‧殼體13‧‧‧吊飾孔21‧‧‧片體3‧‧‧顯示面板4‧‧‧掃描器54‧‧‧連接埠7‧‧‧按鍵模組71‧‧‧第一按鍵72‧‧‧第二按鍵100‧‧‧電子尺具