The basic mechanism of normal pressure hydrocephalus(NPH) is found in an impediment to CSF absorption. In about half of the cases, the etiology remains obscure. NPH is more frequently found in elderly people. The main symptoms are gait disturbances, urinary incontinence and various degree of cognitive changes. The current treatment is ventriculo-peritoneal shunting, ideally using an adjustable valve. In about half of surgical operations, results are poor. Hyeongbangjihwang-tang(荊防地黃湯) is used to treat Soyangin(少陽人) weakness(虛弱) and edema(浮腫). It is and important Gang-Yin(降陰) medicine. A Soyangin patient diagnosed with NPH, who had undergone surgery for ventriculo-peritoneal shunting, was treated with Hyeongbangjihwang-tang. Significant improvement of clinical symptoms was seen, so it is here reported.