A chip package includes: a substrate having a first and a second surfaces; an optical device on the first surface; a conducting layer on the second surface; a passivation layer on the second surface and the conducting layer, wherein the passivation layer has an opening exposing the conducting layer; a conducting bump on the second surface and having a bottom and an upper portions, wherein the bottom portion is disposed in the opening and electrically contacts the conducting layer, and the upper portion is located outside of the opening and extends along a direction away from the opening; a recess extending from a surface of the conducting bump toward an inner portion of the conducting bump; and a light shielding layer on the second surface, extending under the upper portion, and partially located in the recess and overlapping a portion of the conducting bump.