A display device includes a display panel including a plurality of panel pads, a connection board including a plurality of connection lines, and a circuit board including a plurality of board pads. The plurality of connection lines are spaced apart from each other. Each of a connection line among the plurality of connection lines includes: a first end portion at which the connection line is connected to the display panel, the first end portion being in direct contact with a panel pad, and a second end portion opposite to the first end portion and at which the connection line is connected to the circuit board, the second end portion being in contact with a board pad.