This study analyzed the psychological relaxation effects of different forest types on users . Forests were classified into Chamaecyparis obtusa, Quercus serrata, and Pinus densiflora, and 180 subjects were enrolled for the study. Mood improvement was analyzed using profile of moods states (POMS). After staying in the three types of forests, the emotional conditions of all subjects improved with respect to psychological stability. Chamaecyparis obtusa and Pinus densiflora forests were particularly helpful in ameliorating mood states. With respect to subcategory, C. obtusa forest improved conditions such as tension, confusion, and vigor, Q. serrata forest improved tension and P. densiflora forest improved tension, depression, fatigue, confusion, and vigor. Also, it is reported the improvement of tension and vigor in Hypertensive, tension, fatigue, confusion on diabetic, as well as tension, fatigue, confusion and vigor in ordinary peoples. The psychological reactions differed according to the forest type and disease types. Therefore, the forest should be selected according to the purpose of mood improvement.