To provide an organic EL panel which improves the heat radiation performance and the strength and suppresses the occurrence of display failures, and to provide a manufacturing method of the organic EL panel.

An organic EL panel is formed by forming an organic EL element, holding at least an organic light emitting layer between both electrodes 2, 4, on a support substrate 1 and disposing a sealing substrate 5 hermetically covering the organic EL element on the support substrate 1 through an adhesive 6 containing a spacer 6a. A filler 7 containing a heat radiation filler 7a is arranged on a surface of the sealing substrate 5 which faces the organic EL element. The filler 7 has the height T2 at the time of the arrangement which is lower than the height T1 of the adhesive 6 at the time of the arrangement and is higher than the diameter a1 of the spacer 6a, and the heat radiation filler 7a has the diameter a2 smaller than the diameter a1 of the spacer 6a. The sealing substrate 5 and the support substrate are pressurized and bonded after the filler 7 is disposed.