An electronic component (11) is embedded in an end portion of a surface (P1) and an end portion of a surface (P2) adjacent to each other in a three-dimensional base (2). The portion of an electrode (21) exposed from the surface (P1) and an electrode (101) of a packaged IC (41) are connected to each other via a wiring line (201). The portion of the electrode (21) exposed from the surface (P2) and an electrode (25) of an electronic component (15) are connected to each other via a wiring line (202). Accordingly, it is possible to realize a three-dimensional circuit structure requiring no wiring line spanning over or along an end portion thereof.