A display device includes a driver including flexible circuit boards connected to a display panel. The driver includes a first source circuit board, a second source circuit board, a main circuit board including a controller that generates a power source voltage and applying the power source voltage to each of the first source circuit board and the second source circuit board, and a connector connecting the first source circuit board and the second source circuit board. The connector is electrically connected to a first voltage line that is the most adjacent to the second source circuit board among the voltage lines of the first source circuit board and a second voltage line that is the most adjacent to the first source circuit board among the voltage lines of the second source circuit board.