A touch display panel having a display region, a peripheral region surrounding the display region, and a sensing region located between the display region and the peripheral region is provided. The touch display panel includes a pixel array, a touch electrode, an active device, at least one first sensor, at least one second sensor, and a light-shielding layer. The pixel array is located in the display region. The touch electrode located in the sensing region and the pixel array are separated from each other. The active device coupled to the touch electrode is located in the sensing region. The at least one first sensor and the at least one second sensor are located in the sensing region and separated from each other. The light-shielding layer covers the at least one first sensor.