A printed circuit board can include a base layer, a first surface and a second surface opposite to each other. A first routing layer can be on the first surface and a second routing layer can be on the second surface, the first routing layer can be provided at an upper part of each of the first and second regions and the second routing layer can be provided at a lower part of each of the first and second regions. The upper part of the first region can have a first line-area ratio, the upper part of the second region can have a second line-area ratio, the lower part of the first region can have a third line-area ratio, the lower part of the second region can have a fourth line-area ratio, the second and third line-area ratios can be greater than each of the first and fourth line-area ratios.