Cement reactivating machine, by means of an instantaneous infrared light source, enabling rapid reheating of the cement-coated part of the sole and shoe. This system has the advantage of preventing excessive softening of the sole, particularly if in pvc. Manual and automatic operation. output according to sole press output. The machine is equipped with devices to allow adjustment of the following: * time for switch the lamp * reactivation time * shoe reactivation temperature * distance of sole from lamp * tilt angle of sole-holder carriage