Provided are a method, an apparatus, and a computer program for generating road network data for an autonomous driving vehicle. The method of generating road network data for an autonomous driving vehicle, which is performed by a computing device, the method includes generating one or more roads by grouping a plurality of unit lanes, generating connection information about the one or more roads, and generating road network data including road graphs generated by graphing the one or more roads and reflecting the connection information on the graphed one or more roads.