A touch display device includes: a second substrate disposed corresponding to a first substrate; a pixel array structure disposed between the first substrate and the second substrate; and a color filter structure disposed between the pixel array structure and the second substrate. Herein, the pixel array structure includes: a scan line extending along a first direction; a data line extending along a second direction, wherein the scan line and the data line are crossed; and a first touch signal line extending along the second direction and overlapping with the data line. The color filter structure includes: a first red unit, a first green unit and a first blue unit arranged along the first direction; and the first touch signal line locates between the first red unit and the first green unit or locates between the first green unit and the first blue unit.