A chip package is provided. The chip package includes a redistribution structure including an insulating layer and a wiring layer. The wiring layer is in the insulating layer. The chip package includes a chip over the redistribution structure and electrically connected to the wiring layer. The chip package includes an interposer substrate over the redistribution structure and the chip, wherein a portion of the chip is in the interposer substrate. The chip package includes a conductive structure between the interposer substrate and the redistribution structure and electrically connected to the wiring layer. The conductive structure includes a conductive bump or a conductive pillar. The chip package includes a molding layer surrounding the interposer substrate and the conductive structure. The molding layer is partially between the interposer substrate and the redistribution structure and partially between the interposer substrate and the chip.