A display device includes: a lower substrate including a display area and a non-display area; an upper substrate facing the lower substrate; a sealing portion on the non-display area and between the lower substrate and the upper substrate; an optical transmittance layer between the lower substrate and the upper substrate, and surrounded by the sealing portion; a first light blocking portion on the display area of the lower substrate; and a second light blocking portion on the non-display area of the lower substrate. The second light blocking portion includes a base portion, a barrier wall protruding from the base portion and a protruding portion protruding from the barrier wall. A total height of the second light blocking portion at the base portion thereof is less than a total height of the second light blocking portion at the barrier wall and the protruding portion thereof.