A display device includes: a main display area and a sub-display area having a plurality of transmission parts; a plurality of main pixel electrodes; a plurality of sub-pixel electrodes and a plurality of dummy electrodes in the sub-display area, the dummy electrodes being electrically connected to any one of the main pixel electrodes; and a plurality of connection electrodes connecting any one of the plurality of main pixel electrodes and any one of the plurality of dummy pixel electrodes to each other, wherein the sub-display area includes a first sub-display area having the transmission parts and the sub-pixel electrodes and a second sub-display area having the sub-pixel electrodes and the dummy pixel electrodes, and at least portions of the plurality of connection electrodes are between the dummy pixel electrodes adjacent to each other or between the dummy pixel electrode and the main pixel electrode adjacent to the dummy pixel electrode.