Abstract: The printed inductance comprises at least a first conductive rectangular spiral having its geometric origin on the long midline of the rectangle and which is adapted to be folded at its midline while being supported by one of the faces of a flexible insulating supporting-plate. The supporting-plate is folded back through 180.degree. along the midline axis passing through the geometric origin of the spiral. The geometric origin of the rectangular spiral coincides with the internal connecting terminal of the conductive spiral, so as to produce a magnetic field which is coplanar with the plane of the folded supporting-plate. A second conductive spiral conforming in every respect to the first spiral may be supported by the other face of the supporting-plate. The first and second rectangular spirals are thus seen to be identical and symmetrical with respect to the fold axis. A hole having metallized walls connects the internal terminals of the spirals therebetween.