Abstract
There are many kind of involuntary action. Especially, the authors focus on the essential tremor. The incidence of essential tremor is high and it has a bad effect for activity of daily life. However, approach to treating essential tremor is symptomatic therapy because the pathogenesis is not clear. We developed an equipment for patients of essential tremor to support activity of daily living. The equipment targets the wrist because essential tremor develops most frequently in the wrist. The equipment has bag structure made by plastic film and it expands by air pressure. So, the equipment is lightweight, compact and wearable by using air pressure.