A display device includes a substrate including a display area and a non-display area, a first pixel disposed at an outermost side of the display area of the substrate, a dummy pattern extending from the first pixel to the non-display area, and a signal pad disposed outside the dummy pattern and electrically connected to the first pixel. The first pixel includes a pixel circuit layer including a transistor disposed on the substrate, a display element layer disposed on the pixel circuit layer and including light emitting elements, and a first color conversion layer disposed on the display element layer. The dummy pattern is disposed on the pixel circuit layer in the non-display area adjacent to the first color conversion layer, and an upper surface of the dummy pattern is lower than an upper surface of the first color conversion layer.