PROBLEM TO BE SOLVED: To provide a device which comprises an invasive electrode and a noninvasive electrode, and a method which can improve the efficiency and harmless property of electrotransfer, which can reduce toxicity thereof and which can reduce the degree of muscular contraction.SOLUTION: A device is used for optimum delivery of an active principle 36 to human or animal tissue for chemical treatment or gene therapy, using an electric field or an electric current. The device comprises an electrode 9 that is connected to a current generator. The device provides higher efficiency, reproducibility and safety, which are achieved by using an applied electrode device and optimum current intensity.COPYRIGHT: (C)2015,JPO&INPIT【課題】侵襲電極及び非侵襲電極を備えるデバイス、並びに、エレクトロトランスファーの効率及び無害性を改善でき、その毒性を低減でき、且つ筋収縮の程度を軽減できる方法を提案する。【解決手段】電場若しくは電流を使用する、化学治療又は遺伝子治療のためのヒト若しくは動物組織への活性素36の最適な送達のためので、電流発生装置に接続された電極9からなり、適合された電極デバイス及び最適な電流強度を用いて達成される、より良い効率、再現性、及び安全性を提供する。【選択図】図1