Planar light emitting device

A planar light emitting device comprising:

• a light emitting panel including a transparent substrate, which is tetragonal as viewed from above, an organic EL element, which is formed on one main surface of the transparent substrate and includes an anode and a cathode, and a plurality of power supplying units, which are formed along at least one side of the transparent substrate and are each connected to either one of the anode or cathode of the organic EL element;
• a plurality of connection substrates including an insulation substrate arranged facing toward the power supplying units, a plurality of connection electrodes formed on a first main surface of the insulation substrate facing toward the power supplying units, a plurality of connection terminals formed on a second main surface of the insulation substrate on the opposite side of the first main surface, an anode bus line that electrically connects, among the connection terminals and the connection electrodes, a connection terminal and a connection electrode that correspond to the anode of the organic EL element to each other, and a cathode bus line that electrically connects, among the connection terminals and the connection electrodes, a connection terminal and a connection electrode that correspond to the cathode of the organic EL element to each other;
• and
• a connection member that electrically connects the power supplying units of the light emitting panel and the connection terminals of the connection substrates.