A biological information measuring device includes: a pulse wave sensor unit which detects a pulse wave of a living body and outputs a pulse wave signal； an MCU which generates heart rate information and time information； a storage unit capable of storing the heart rate information； operation buttons which output an operation signal corresponding to an input operation by a person； and a display unit. The MCU displays the time information on the display unit in a time display mode, writes the heart rate information in the storage unit in a measuring mode, and displays the heart rate information on the display unit without writing the heart rate information in the storage unit in a heartbeat display mode
