A display panel including a first substrate having a pixel region, a thin film transistor, an insulating layer, a pixel electrode, a second substrate, and a display medium is provided. The thin film transistor is located on the first substrate and in the pixel region. The insulating layer is located in the pixel region and covers the thin film transistor. The insulating layer has a contact hole having a first maximum distance extending along a first direction and a second maximum distance extending along a second direction. The first direction is different from the second direction. The second maximum distance is longer than the first maximum distance. The pixel electrode is electrically connected to the thin film transistor through the contact hole. The display medium is located between the first substrate and the second substrate.