An inductance element includes: an insulative substrate body of a rectangular solid shape having length dimension L, height dimension H, and width dimension W, where 1.5≤W/H; at least one internal conductor built in the substrate body and capable of making an electrical current flow therethrough in one uniform direction orthogonal to a cross-section of the substrate body; and a pair of external electrodes provided on the surface of the substrate body in a manner respectively connected to both ends of the internal conductor, so that the internal conductor can make an electrical current flow therethrough in the one uniform direction; wherein, in the cross-section of the substrate body, a rectangular internal conductor region having height dimension Eh and width dimension Ew surrounds the internal conductor in a manner contacting the outermost positioned portions of the internal conductor in the height and width directions, wherein Ew/Eh>W/H.