Spinal stenosis is a localized narrowing of the spinal canal due to structural abnormalities. Its symptoms are obscure, and characterized by chronic, poorly localized, bilateral nerve compression signs, and intermittent claudication. Teatment is controversal, and there is no established theory on its surgical treatment, but complete decompression is understood to be very important. Authors have treated 15 cases of lumbar spinal stenosis by the method of Modified Harrington Rod fixation between 1987 and 1989 at orthopaedic department, Wallace Memorial Baptist Hospital. The obtained results were as follows;1. The mean age was 51 years old and male were 6 cases, female were 9 cases. 2. The most common cause was degenerative type in 10 cases (67%). 3. Among the 15 cases, 6 cases were excellent, 6 cases were good, 2 cases were fair and 1 case was poor according to Kirkaldy-Willis criteria. 4. Aftercare was 2 weeks of bed rest, and then walked with brace (TLSO). 5. On follow up, 2 cases of metal failure (pedicle screw neck fracture) were found but symptoms were not aggrevated and union was done. 6. The Modified Harrington rod may be used with its benefit in selected cases to be required 2 or 3 segmental fusion after posterior decompression and the results will be excellent.