A display device includes a substrate including a display area to display an image and a pad area disposed around the display area; and a first pad unit positioned on the pad area, and including a first terminal region having a plurality of first pad terminals arranged in a first direction, in which each of the plurality of first pad terminals includes: a plurality of first connection pad terminals arranged in a first row disposed at a first angle relative to the first direction; a plurality of second connection pad terminals spaced apart from the plurality of first connection pad terminals, and arranged in a second row disposed at a second angle relative to the first direction; and a first terminal connection line configured to connect one of the plurality of first connection pad terminals and one of the plurality of second connection pad terminals, and having at least one bent shape. The first terminal connection line is disposed in a different layer from that of the first connection pad terminal and the second connection pad terminal.