In an image sensor chip package method, a transparent substrate having an upper surface, a lower surface, and through holes is provided. The through holes pass through the transparent substrate. Conductive posts are formed in the through holes. A sealing ring is formed on the lower surface of the transparent substrate. A chip having an active surface, an image sensitive area, and die pads is provided. The image sensitive area and the die pads are located on the active surface. Conductive bumps are formed and respectively disposed on the die pads for respectively connecting the conductive posts. At the time the active surface of the chip is turned to face toward the lower surface of the transparent substrate. The chip is assembled to the transparent substrate and electrically connected with the conductive posts via the die pads. The sealing ring surrounds the image sensitive area and the die pads.