Tremor is a rhythmic and involuntary muscular contraction characterized by oscillations of a part of the body. The most common of all involuntary movements, tremor can affect various body parts such as hands, head, facial structures, vocal cords, trunk, and legs; most tremors, however, occur in the hands. Clinically, tremor is classified into postural tremor, resting tremor, action tremor, and other kinds of tremor, and treated according to the causes. The author reports the improvement of the patient, hospitalized at Dong Seo Medical Center, whose tremor was not classified specifically in western medicine but was diagnosed as Ganhyeolbujok (肝血不足) by Korean medicine.