A blood glucose measurement device (50) comprises a test piece insertion unit (10) for inserting, holding, and electrically connecting a test piece on which an electrode pattern has been formed, a measurement circuit (16) for electrochemically measuring a biological sample that has been placed in the form of a spot on the test piece, a communication circuit (15) for transmitting the result of measurement with the measurement circuit (16) by wireless communication using an antenna electrode (2C) equipped with the test piece, and a switch (14) that is connected to the test piece insertion unit (10) for switching between the measurement circuit (16) and the communication circuit (15).