PURPOSE: A cooling apparatus of a gasoline direct injection engine is provided to improve the endurance of a cylinder head injector by connecting the cooling path of a cylinder block to the cooling path formed on the lower side of the injector. CONSTITUTION: A cooling apparatus of a gasoline direct injection engine comprises a cylinder head and a first cooling path. The cylinder head is coupled with the cylinder block and comprises an injector mounting hole. The first cooling path is formed around the injector mounting hole, and includes a first water jacket installed between the injector mounting hole and the cylinder block and a target jacket connected to the first water jacket and extended toward a nozzle hole(15b) of the injector installed in the injector mounting hole.
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