A touch display device includes a thin-film transistor (TFT) substrate and a light-emitting element. The TFT substrate has a substrate and a TFT structure. The TFT structure is disposed on the substrate and includes a driving transistor. The light-emitting element is disposed on the TFT structure and has a first end electrode, a light-emitting layer and a second end electrode. The first end electrode is electrically connected with the driving transistor. The light-emitting layer is disposed between the first end electrode and the second end electrode. The first end electrode or the second end electrode is a touch sensing electrode of the touch display device.