A display device includes a display unit including pixels in an area defined by a plurality of scan lines and a plurality of data lines, a scan driving unit configured to apply a plurality of scan signals to the scan lines, a data driving unit configured to apply a plurality of data signals to the data lines, an inspection circuit unit configured to apply a plurality of inspection signals to the data lines, a plurality of inspection pads configured to transmit a plurality of inspection control signals to the inspection circuit unit, a plurality of first inspection lines electrically connecting the inspection circuit unit to the inspection pads, and a plurality of second inspection lines branching off from the first inspection lines and electrically connecting the inspection circuit unit to the data driving unit.