A method for manufacturing a package includes: preparing a lead frame that, in a region where the package is to be formed, has first and second electrodes, and has a through-hole at a position that spans across outer edges of the region; clamping the first and second electrodes between upper and lower molding dies; injecting a first resin into the molding dies, through an injection opening formed adjacent to the first electrode and on the outside of the region, so that the first resin has a wall that constitutes a side wall of a bottomed concave component with an outer lead component protruding outward from the wall, and a height of the side wall is larger than a thickness of the outer lead component; curing or solidifying the injected first resin; and cutting out an injection mark by cutting the lead frame at the outer edges of the region.