Provided is a vehicle data providing apparatus supporting to easily generate vehicle internal communication data at the development stage of a product to perform a test. According to an aspect, there is provided a vehicle data providing apparatus including: a vehicle data analyzer configured to analyze a vehicle data file that is used in a vehicle, and to provide a reference data graph about reference data included in the vehicle data file; a vehicle data changing unit configured to receive a user input signal for changing the reference data, and to change related data associated with the reference data based on the reference data graph; and a test data file generator configured to generate a vehicle data file for test, including the changed reference data and the changed related data.