Provided is an integrated antenna package structure including a chip, a circuit structure, a shielding body, an encapsulant, a first antenna layer, a dielectric body, and a second antenna layer. The circuit structure is electrically connected to the chip. The shielding body is disposed on the circuit structure and has an accommodating space. The chip is disposed in the accommodating space of the shielding body. The encapsulant is disposed on the circuit structure and covers the chip. The first antenna layer is disposed on the circuit structure and is electrically connected to the circuit structure. The dielectric body is disposed on the encapsulant. The second antenna layer is disposed on the dielectric body. A manufacturing method of the integrated antenna package structure is also provided.