Thorough study of work conditions and health state of stone masons proved physical overload to be a principal factor in charge of the occupational diseases. The physical overload is associated with prevalent manual tasks, frequent monotonous movements, lifting and manual carriage of heavy net weight during the working shift, uncomfortable working postures, unfavorable climate conditions. Nearly half (55.9%) of the examinees were diagnosed as having peripheral neurologic disorders and locomotion diseases--autonomous and sensory polyneuropathy, "frozen shoulder" syndrome, shoulder epicondylitis.