Abstract: A ski boot, in particular a telemark boot, having a shell made of plastic material and in turn having a bottom wall, two lateral walls, a toe portion, and a flexible portion extending crosswise with respect to the shell, from one side to the other of the bottom wall at the metatarsus; and a frame embedded in the shell and having, integrally, two longitudinal elements extending along respective lateral walls from a rear portion of the shell to an intermediate portion of the bottom wall adjacent to respective lateral ends of the flexible portion, and a transverse structure connected integrally to respective front ends of the longitudinal elements and defined by a flat bottom portion embedded in the bottom wall, and by a top portion extending along the connecting portion between the toe portion and the flexible portion.