A 13-years-old boy was admitted to our clinic on November 8, 1967. He had presented a history of generalized convulsion with unconsciousness since four years of age. The convulsion occure dseveral times in a year and was Jacksonian type beginning from left hand. Since six years of age, he had been slightly lame in the left leg. On admission, he was in status epilepticus. His clinical signs were generalized convulsion of Jacksonian type with unconsciousness, headach, nausea, dizziness, slight lameness of left leg, impediment of vision and decline of intelligence. The several examinations were carried out indetail. The hemoglobin 13.2 gm. Per 100ml., hematcrit 40.9%, the red cell count 4.68 M per cm., and the white cell count 5400 with a normal differential proportion. Serum protein was 7.6gm. per 100ml. and blood suger was 72mg. per 100ml. Serum alubumin, globulin, cholesterol, cholinesterase, alkaline phosphatase, phenol turbance test, urea nitrogen, cephalincholesterol flocculation test and icteric index were within normal values. The serologic test for syphilis was negative.