A roll paper for a thermal printer in which a coloring paper having a thermal coloring layer and a peeling paper on which the coloring paper with the coloring layer is stuck by an adhesive material are wound as a roll shape is comprised of first cuts for defining a picture forming region of one frame on the coloring paper in order for the picture forming region to be peeled off from the peeling paper and second cuts formed to completely cross the entire width of the roll paper, in which the first and second cuts are repeatedly formed at every picture forming region in the length direction of the roll paper.