To perform data transmission by using a commercial terminal while suppressing costs even in an environment where radio waves from a mobile phone base stations do not or cannot reach easily.SOLUTION: A vital data collection system to collect vital data of a person acting under an environment where radio waves from a mobile phone base station do not or cannot reach easily includes a sensor that is carried by the person and measures vital data of the person, a relay that is carried by the person, acquires vital data of the person measured by the sensor, and transmits the acquired vital data by low power consumption long distance wireless communication, and a collection server that collects the vital data transmitted from the relay via a network.SELECTED DRAWING: Figure 1
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