Wiring board

A wiring board comprising:

• a first insulation layer comprising a first surface and a second surface located on an opposite side to the first surface;
• a second insulation layer located at an outermost layer among insulation layers located on a side of the first surface;
• a third insulation layer located at an outermost layer among insulation layers located on a side of the second surface;
• a first mounting region located on an outermost surface on the side of first surface;
• a second mounting region located on the outermost surface on the side of the first surface and surrounding the first mounting region;
• a plane conductor located on a surface of the third insulation layer;
• and
• a solder resist covering the surface of the third insulation layer and the plane conductor and provided with an opening that exposes part of the plane conductor,
• wherein, in plane perspective, in a frame-shaped region between an outer peripheral edge of the first mounting region and an outer peripheral edge of the second mounting region, the plane conductor comprises clearances at point-symmetric positions taking a center of the opening as a point of symmetry.