A touch display panel includes a first substrate, a second substrate, a plurality of scan lines and data lines, a plurality of active devices, and an organic light emitting diode pixel array is provided. The first substrate is opposite to the first substrate. The scan lines and the data lines are intersected and disposed on the first substrate. The active devices are disposed on the first substrate, and each active device is electrically connected with the corresponding scan line and data line. The organic light emitting diode pixel array includes a plurality of organic light emitting diode pixel units, and is disposed on the first substrate. Each organic light emitting diode pixel unit includes a first electrode, a second electrode and an organic light emitting layer. At least one of the scan lines, data lines and the second electrodes transmits a touch driving signal or a touch sensing signal.