PROBLEM TO BE SOLVED: To provide a biological information measurement device capable of improving accuracy of detecting biological information.SOLUTION: The biological information measurement device comprises a biological information detection unit, a control unit 9, and a housing. The biological information detection unit includes: a first side electrode (front side electrode 541) having electrodes 5411, 5412 exposed in a first side of the housing and accessible to a user； a second side electrode (back side electrode 542) having electrodes 5421, 5422 exposed in a second side of the housing and in contact with the user； and a cardioelectricity detection unit 547 for detecting the cardioelectricity of the user, using the first side electrode and the second side electrode. At least one of the first and second side electrodes has a plurality of electrodes. The control unit 9 sets one of the electrodes included in the first side electrode and one of the electrodes included in the second side electrode as a working electrode, sets one of the electrodes which have not been set as the working electrode as a reference electrode, and causes the cardioelectricity detection unit 547 to measure the cardioelectricity of the user, based on the current detected by the working electrodes.SELECTED DRAWING: Figure 5【課題】生体情報の検出精度を向上できる生体情報測定装置を提供すること。【解決手段】生体情報検出部、制御部９及び筐体を備え、生体情報検出部は、筐体における第１面に露出し、使用者に接触可能な電極５４１１，５４１２を有する第１面側電極（正面側電極５４１）と、第２面に露出し、使用者に接触する電極５４２１，５４２２を有する第２面側電極（背面側電極５４２）と、第１面側電極及び第２面側電極を用いて、使用者の心電を検出する心電検出部５４７と、を有し、第１面側電極及び第２面側電極のうち少なくとも一方は、複数の電極を有し、制御部９は、第１面側電極のうちの１つと第２面側電極のうちの１つとを使用電極に設定するとともに、使用電極に設定されなかった電極のうちの１つを基準電極に設定し、使用電極により検出される電流に基づいて、心電検出部５４７に使用者の心電を測定させる。【選択図】図５
