A touch display device including scan lines, data lines, metal common lines, pixel sets, a common electrode layer, light-shielding patterns and touch electrode patterns is provided. Each metal common line is located between two adjacent scan lines. Each pixel set is located between two adjacent metal common lines. The common electrode layer includes common electrode portions disposed corresponding to the metal common lines. A vertical projection of each metal common line is completely located within a vertical projection of the corresponding common electrode portion. The light-shielding patterns are disposed corresponding to the metal common lines, and a vertical projection of each metal common line and the scan lines adjacent thereto is completely located within a vertical projection of the corresponding light-shielding pattern. The touch electrode patterns are disposed corresponding to the metal common lines, and a vertical projection of each touch electrode pattern is completely located within a vertical projection of the corresponding common electrode portion.