Productivity of an organic EL panel sealed by a metal board is improved. A method for manufacturing the organic EL panel has a sealing section defining step (S2) having a first etching step (S21) and a second etching step (S22). In the first etching step, one side of a sealing sheet is partially etched, and a first groove section is formed along an outer end of the sealing section. In the second etching step, the other side of the sealing sheet is partially etched, and a second groove section, which penetrates the first groove section along the outer end of the sealing section, excluding a cuttable connecting section, is formed. A substrate, which has undergone an element section forming step (S1) and is to be divided, and a sealing sheet which has undergone the sealing section defining step (S2) are bonded (bonding step (S3)), then, the sealing sheet is cut for the sealing section, and the substrate to be divided is divided by each region (cutting/dividing step (S4)).