A biological sample measurement device includes a biological sample measuring instrument and measurement-related information supply instrument which supplies measurement-related information. Measurement-related information supply instrument has reading unit which reads the measurement-related information, first storage unit which stores identification information of measurement-related information supply instrument, and transmission unit which transmits the measurement-related information and the identification information of measurement-related information supply instrument to the biological sample measuring instrument. The biological sample measuring instrument has a main body case which has a mounting portion of a biological sample detection sensor and a display unit, a measurement unit which is connected to the mounting portion inside the main body case, a control unit which is connected to the measurement unit, and a reception unit which is connected to the control unit and receives the measurement-related information and the identification information of the measurement-related information supply instrument transmitted from the transmission unit.