A package structure includes a redistribution structure and a core substrate. The redistribution structure includes a plurality of connection pads. The core substrate is disposed on the redistribution structure and electrically connected to the plurality of connection pads. The core substrate includes a first interconnection layer and a plurality of conductive terminals. The first interconnection layer has a first region, a second region surrounding the first region, and a third region surrounding the second region, and includes a plurality of bonding pads located in the first region, the second region and the third region. The conductive terminals are electrically connecting the plurality of bonding pads to the plurality of connection pads of the redistribution structure, wherein the plurality of conductive terminals located over the first region, the second region and the third region of the first interconnection layer have different heights.