The present invention provides an in-vehicle touch display device. The in-vehicle touch display device includes a backlight module, a touch display module, and a sealant. The touch display module is placed over the backlight module. The touch display module includes a touch screen, an upper polarizing film, a liquid crystal layer, and a lower polarizing film sequentially stacked on each other. The sealant joins the backlight module and the touch display module together. The sealant includes two protrusions protruding between the backlight module and the touch display module. An adhesive layer is positioned on a side surface of each protrusion facing the lower polarizing film.