Abstract: A semiconductor package structure is provided. The semiconductor package structure includes a carrier substrate, an interposer substrate, a connecting element, a first semiconductor device, a second semiconductor device, a first underfill layer, and a package layer. The interposer substrate is disposed on the carrier substrate. The connecting element is disposed in the interposer substrate. The connecting element includes a dielectric element and first conductive features disposed in the dielectric element. The first semiconductor device and the second semiconductor device are disposed on the interposer substrate. The first semiconductor device is electrically connected to the second semiconductor device through the connecting element. The first underfill layer is disposed between the first semiconductor device, the second semiconductor device, and the interposer substrate. The package layer surrounds the first semiconductor device, the second semiconductor device, and the first underfill layer.