Occupational stress and muskuloskeletal complaints was studied in t wo metal-industry workplaces. Measurements were obtained twice with a 6-month interval. Occupational stress was measured by the lob Stress Survey (SpieIberger & Vagg, 1999) and muskuloskeletal complaints was measured by 5-point rating scales. Results showed that the lSS scale values, as weIl as the musculoskeletal pain ratings, were quite stable over the six-month interval. The three lSS scales showed high reliability. The t wo factories differed with respect to the pattern of scale values, but the se patterns remained over the six months, suggesting that the lSS instrument reflects major stress structures in the factory , rather than occasional changes in production.