An electronic package structure is provided, including a substrate, a package encapsulant disposed on the substrate, and an antenna structure corresponding to a disposing area of the package encapsulant and having a first extension layer, a second extension layer disposed on the substrate, and a connection portion disposed between and electrically connected to the first extension layer and the second extension layer. Through the formation of the antenna structure on the disposing area of the package encapsulant, the substrate is not required to be widen, and, as such, the electronic package structure meets the miniaturization requirement.