A display device includes a substrate including a display area, a non-display area and a conductive material, a display layer on a top surface of the substrate and including a light-emitting element, a signal line extending from the display layer and into the non-display area, a conductive adhesive member on a bottom surface of the substrate, and a circuit board which is electrically connected to the signal line by contact of the circuit board with the conductive adhesive member, together with contact of the conductive material in the substrate with both the signal line and the conductive adhesive member.