PROBLEM TO BE SOLVED: To provide a thermoelectric treatment instrument for solving a problem becoming nervous about the light of display means in a dark room and capable of being operated even in a state immediately after the room is darkened to lie.SOLUTION: An emission for illuminating operation means, drive means for performing the ON/OFF driving and extinction driving of the emission means under the control due to control means and an extinction timer for counting a predetermined time from the start of treatment are used to perform processing for starting not only treatment operation but also the clocking of the extinction timer and processing for controlling the drive means when the clocking of the extinction timer reaches the predetermined time to perform the extinction of the emission means by the control means.COPYRIGHT: (C)2012,JPO&INPIT【課題】暗い部屋で表示手段の光が気になる問題を解決するとともに、部屋を暗くして横たわった直後の状態においても操作可能とする、温熱電位治療器の具現化を課題とする。【解決手段】操作手段を照明する発光手段と、制御手段からの制御で発光手段のON/OFF駆動及び減光駆動する駆動手段と、治療開始から所定時間まで計時する減光タイマーとを用い、治療動作を開始するとともに減光タイマーの計時を開始する処理と、減光タイマーの計時が所定時間に達しと時に駆動手段を制御し発光手段を減光させ処理を制御手段が行うことで課題を解決する。【選択図】図1