A digitizer includes a folding area a non-folding area. The digitizer includes a first base layer, a second base layer disposed on the first base layer, a third base layer disposed on the second base layer, a first sensing line disposed between the first base layer and the second base layer, and a second sensing line substantially perpendicular to the first sensing line, disposed between the second base layer and the third base layer, and including a first sub-line portion and a second sub-line portion disposed in the non-folding area, and a third sub-line portion disposed between the first sub-line portion and the second sub-line portion and corresponding to the folding area. The third sub-line portion has a fracture strain greater than a fracture strain of the first sub-line portion and the second sub-line portion.