A display device includes a display panel, a barrier layer, and a sealant. The display panel includes a backplane and a frontplane disposed on the backplane, wherein the frontplane includes a plurality of frontplane sidewalls. The frontplane sidewalls at least include a first frontplane sidewall and a second frontplane sidewall, forming a frontplane concavity. The barrier layer includes a first barrier layer sidewall and a second barrier layer sidewall, wherein the first barrier layer sidewall and the second barrier layer sidewall form a barrier layer concavity. The barrier layer concavity corresponds to the frontplane concavity, and at least one of the barrier layer concavity and the frontplane concavity does not include a right angle. The sealant is disposed in a sealant accommodating space defined by the frontplane sidewalls of the frontplane, an inner surface of the backplane and an inner surface of the barrier layer.