An organic light-emitting display apparatus includes: a lower substrate including a major surface, which comprises a display area and a sealing area surrounding the display area when viewed in a direction perpendicular to the major surface; an insulating structure disposed over the lower substrate in both the display area and the sealing area; a plurality of openings formed through the insulating structure in the sealing area, the openings comprising inner side surfaces; a first conductive layer including a first portion over the insulating structure extending in a horizontal direction, and a second portion extending on at least part of the inner side surfaces of the openings in a vertical direction; an upper substrate placed over the lower substrate; and a sealing member interposed between the lower substrate and the upper substrate in the sealing area thereof and filing the openings, thereby integrating the lower and upper substrates.