In an apparatus for managing data processed in a vehicle, from outside the vehicle, acquired is a management rule including at least one of information indicating types of data to be acquired by an external device placed outside the vehicle and information indicating an acquisition cycle at which the data should be acquired. At least one of the type of data and the acquisition cycle is set by making reference to the management rule in response to acquisition of the management rule. Data is acquired, which is according to at least of one of the type of data and the acquisition cycle. The acquired data is stored in a data recorder.