Display device including photo pixel with improved sensing sensitivity

A display device includes a substrate, a driving layer which is disposed on the substrate, and includes first driving circuit groups each including N first pixel driving circuits and photo pixels each including a photo driving circuit and a photo sensor electrically connected to the photo driving circuit. A display element layer is on the driving layer, and includes first display element groups each including N first display elements electrically connected to the respective N first pixel driving circuits. Minimum distances between first color display elements included in the first display elements in a first predetermined direction in a plan view, are substantially the same. A distance between two first pixel driving circuits adjacent to each other in a second predetermined direction with the photo pixel therebetween in the plan view is different from a distance between two first pixel driving circuits continuously disposed in the second predetermined direction.