Provided is a planar light emitting device which is highly productive employing inexpensive FPCs capable of being easily electrically connected, and which has a light emitting region with reduced unevenness in luminance and hence is highly reliable. The planar light emitting device, which has a light emitting surface and a back surface, includes a planar light emitting tile including a planar light emitting element and a plurality of flexible printed circuits (FPCs) disposed on the back surface. The planar light emitting tile includes a non-pad region where none of an anode pad and a cathode pad are disposed. In an overlapped region where part of two circuit boards overlap each other, an electrical connection site where an equipotential region of the two circuit boards are directly electrically connected to each other is formed. The non-pad region forms a connecting-part disposed region that overlaps with the electrical connection site.