A vital information measuring device includes: a flexible substrate including a functioning part which is mounted thereon and an outer member for covering the flexible substrate. The functioning part has: a sensor section for sequentially measuring a parameter relating to certain vital information on a subject a circuit section for performing a predetermined process with respect to a measurement signal outputted from the sensor section a memory section for storing therein the measurement signal or measurement data after the process by the circuit section a display section for displaying thereon certain information relating to the measurement and a power source section for supplying a drive voltage to the respective sections of the functioning part.
