A display device includes: a base layer including a display area and a non-display area adjacent to the display area, insulating layers arranged on the base layer, pixels arranged in the display area, pads connected to the pixels, arranged in a first direction, and arranged in the non-display area, and a driving chip connected to the pads. Each of side pads arranged at opposite ends in the first direction among the pads includes: a first conductive pattern; a first insulating pattern including protruding patterns, which protrude in a direction toward the driving chip; and a second insulating pattern disposed on the first insulating pattern.