A display device includes an array substrate including a display area and a non-display area, a driving circuit chip disposed on the non-display area and including a bottom surface, a top surface, a first pair of side surfaces extending in a first direction, and a second pair of side surfaces extending in a second direction perpendicular to the first direction, and first, second, and dummy bumps, each disposed on the bottom surface in a single column along the first direction, in which the dummy bumps include first and second dummy bump groups disposed between the first and second bumps along the first direction, the dummy bumps in the first dummy bump group are spaced apart from each other by a first pitch, and the dummy bumps in the second dummy bump group are spaced apart from each other by a second pitch different from the first pitch.