A display panel includes gate lines extending in a first direction, a first column insulating layer between the gate lines, a gate electrode disposed on the first column insulating layer. The first column insulating layer, the gate lines, and the gate electrode are covered by a gate insulating layer. An active layer is disposed on the gate insulating layer. Source and drain electrodes are disposed above the active layer. Data lines are connected to the source electrode. A second column insulating layer is interposed between the data lines and includes a first contact hole to expose the drain electrode. A contact electrode is disposed in the first contact hole and connected to the drain electrode, a second contact hole is formed through a protective layer to correspond to the first contact hole, and a pixel electrode is connected to the contact electrode through the second contact hole.