To provide a data recording system which, even when each site of measurement moves independently, eliminates the need for complex and enormous wiring work and facilitates association between each sensor and its site of measurement.

A data recording device 10 is installed in each site of measurement on an object to be measured such as a crash-testing dummy 2. Each data recording device 10 sends and receives data to and from a host computer 30 wirelessly. Each data recording device 10 performs simultaneous measurements in accordance with a trigger signal from the host computer 30 and sends measurement data to the host computer 30. In accordance with measurement data obtained by giving a sensor 12 a shock or irradiating it with light, an ID of each data recording device 10 and a site of measurement are automatically associated with each other.