A touch display device is provided. The touch display device can comprise a touch display panel and a protection cover plate. The display panel can comprise a touch sensing region and a non-touch sensing region. The protection cover plate can be provided on the touch display panel and can comprise a display region and a non-display region that surrounds the display region. The display region can correspond to the touch sensing region, and the non-display region can comprise a touch key region. The surface of the protection cover plate that is adjacent to the touch display panel can be defined as a first surface such that a touch key electrode is provided in the touch key region on the first surface and a touch transfer electrode can be provided on the display region on the first surface. The touch key electrode can be electrically connected with the touch transfer electrode.