A cushion pad for head bands, installed at the rear part of a head band worn on a workers head so as to support the back of the workers head while adjusting the length of the head band. The cushion pad includes a pad unit having a concave spherical-shaped surface closely adhered to the back of the workers head and provided with a first prop and second props to support the upper central region and both lower side regions of the back of the workers head, and an adjustment unit formed at the rear of the center of the pad unit and provided with through holes formed at both sides thereof to receive both rear ends of the head band and a rotary lever between the through holes to pressurize and fix the head band, thus allowing a worker to more conveniently and stably wear a welding mask.
