PROBLEM TO BE SOLVED: To effectively maintain the awake state of a subject. SOLUTION: A stimulus presenting unit that presents a vibrational stimulus to at least a part of a subject's body, and whether or not the stimulus presenting unit presents the vibrational stimulus based on the estimated arousal level of the subject and a presentation mode. And a control unit for controlling the vibration stimulation presenting unit, wherein the stimulus presenting unit is arranged in the contact unit and the contact unit that comes into contact with a part of the subject's body, and the vibration stimulation is performed based on the control by the control unit. Provided is a wakefulness maintaining device, comprising: a plurality of stimulus generators to generate. [Selection diagram] Figure 2【課題】より効果的に対象者の覚醒状態を維持する。【解決手段】対象者の体の少なくとも一部に振動刺激を提示する刺激提示部と、推定された上記対象者の覚醒度合いに基づいて、上記刺激提示部による上記振動刺激の提示有無および提示態様を制御する制御部と、を備え、上記刺激提示部は、上記対象者の体の一部と接触する接触部と、上記接触部に配置され、上記制御部による制御に基づいて上記振動刺激を発生させる複数の刺激発生部と、を備える、覚醒維持装置が提供される。【選択図】図２
