Abstract
Human may feel not only discomfort but also comfort in vibration. Some people who have some physical types or preferences for dynamical stimuli would feel good or pleasure to the vibration. Although many investigations into human body vibration have been carried out, there have been little researches that directly tackling the pleasure. The object of the study is to make the vibration inducing to feel the pleasure clear from the viewpoints of physiology, psychology and physics. A vibration experiment was implemented to the subjects who sit in an automobile seat in a dynamical condition in vertical vibration. As a result, there were a passive pleasure and an active pleasure which would be induced in the dynamical condition.
