To provide an electrostimulator capable of preventing increase of a discomfort of a subject due to intraocular flash light felt by the subject.SOLUTION: An electrostimulator comprises an electrode attached to a head of a subject, and stimulus output means for outputting electric stimulus to an electrode. When the electric stimulus is stopped in a halfway, output of stimulus output means is reduced by using a prescribed time in which a subject hardly feels intraocular flash light. When a change amount for a unit time of output when a steady-state value of output of the stimulus output means is set to zero for a prescribed time, and a change amount for a unit time of output in normal stop time of the electric stimulus, are equal, the change amount is set to a stop change amount, and if they are different, a larger change amount is set to the stop change amount. Then, when the electric stimulus is stopped in a halfway, the change amount for unit time is set to the stop change amount and output of the stimulus output means is reduced.SELECTED DRAWING: Figure 3【課題】被験者が眼内閃光を感じて不快感が増大することを防止可能な電気刺激装置を提供する。【解決手段】被験者の頭部に装着する電極と、電極に電気刺激を出力する刺激出力手段と、を備え、電気刺激を途中で停止するとき、被験者が眼内閃光を感じにくい所定時間をかけて刺激出力手段の出力を減少させる。また、刺激出力手段の出力の定常値を所定時間で零にするときの出力の単位時間あたりの変化量と、電気刺激の通常停止時の出力の単位時間あたりの変化量とが等しい場合はその変化量を停止変化量とし、異なる場合は大きい方の変化量を停止変化量とする。そして、電気刺激を途中で停止するとき、単位時間あたりの変化量を停止変化量にして刺激出力手段の出力を減少させる。【選択図】図３
