A structure with electronic component mounted therein includes a wiring board on which an electronic component is mounted at least on its first face, resin provided at least between the electronic component and the wiring board, and a plurality of holes formed in the wiring board at region corresponding to a mounting position of the electronic component. The holes are filled with the resin. This suppresses warpage of the structure with electronic component mounted therein, and also improves reliability by reducing a stress applied to a bonding section between the wiring board and the electronic component.