The objective of the invention lies in providing a potential therapeutic instrument which inhibits discomfort (limp and numb) or uneasiness caused by discharge or vibration when a patient touches a touch panel, and is provided with a liquid crystal display device which can inhibit a fault of the touch panel or the liquid crystal display device and is provided with the touch panel. The instrument is provided with an induction voltage detection circuit (8) which is used for detecting a voltage (V) induced by the liquid crystal display device (5) when the patient on an electrified bottom plate (3) gets close. A voltage control circuit (9) carries out the reduction control of the value of a high voltage generated by a high voltage generation circuit (2) when the voltage (V) induced by the liquid crystal display device (5) is higher than a preset upper limit voltage (Vth).本發明之目的在於獲得一種安裝有可抑制治療者碰觸觸控面板時之放電或振動所引起之不適感(酥麻感)或不安感、或抑制觸控面板或液晶顯示裝置之故障之附設觸控面板之液晶顯示裝置之電位治療器。本發明之電位治療器包含感應電壓檢測電路8，其檢測隨著存在於通電氈片3上之治療者接近，而由液晶顯示裝置5感應之電壓V；且電壓控制電路9構成為於藉由感應電壓檢測電路8檢測出之電壓V高於預先設定之上限電壓Vth之情形時，進行降低藉由高電壓產生電路2產生之高電壓之電壓值之控制。
