Clinical review has been made for 8 cases of Duchenne muscular dystrophy admitted to orthopedic Department during the time between 1964 and 1969. Duchenne type muscular dystrophy, (Duchenne, 1849), is the most common type of the progressive muscular dystrophy. A number of reports have been found regarding its symptomatology, pathogenesis based on muscle biopsy, heredity and the change of serum enzyme such as aldolase, creatine kinase, and transaminase, though no definite treatment has been known. The results were as follows: 1) All eight cases were male of 5 to 13 years of age. 2) Gowers sign and waddling gait were noted in all cases and contracture in two cases. 3) Familial occurrence was noted in two (Case 1, 2). 4) Urinary creatine value was elevated in all cases, while creatinine excretio decreased in seven cases.