To easily set a data recording device mounted on a car.

The device comprises a sensor 2 for measuring the state information on a car and a data recording means 3 for recording a state information outputted from the sensor 2. Further, the data recording means 3 comprises a frequency recording control part 4, which calculates a frequency information based on the state information outputted from the sensor 2, a time series recording control part 6 which calculates a time series information based on the state information outputted from the sensor 2, a medium attaching part 10 where an on-vehicle data storage medium 22, in which the frequency information or the time series information calculated by the time series recording control part 6 or the frequency recording control part 4 is stored is attached, and a measurement condition setting part 8 where, based on an operation control information stored in advance in the on-vehicle data storage medium attached to the medium attaching part 10, either the frequency recording control part 4 or the time series recording control part 6 is selected and, based on the operation control information, a measurement condition for the frequency recording control part 4 or the time series recording control part 6 is set.