The present invention is a method of manufacturing an organic EL display device including a display part arranged with a plurality of pixels including an organic EL light emitting layer, and a terminal part arranged with a plurality of terminals each connected to the organic EL light emitting layer respectively, the method comprising forming a TFT drive circuit layer controlling the organic EL light emitting layer and forming the plurality of terminals connected to the TFT drive circuit layer on a first substrate; forming the organic EL light emitting layer connected to the TFT drive circuit layer over the TFT drive circuit layer; forming a sealing film over the organic EL light emitting layer; adhering a second substrate covering the display part in a position corresponding to the first substrate; forming a touch panel sensor substrate and an electrode layer over the second substrate; and exposing the plurality of terminals by etching a part of the sealing film.