An electrotransfer or electroporation device comprising first 18 and second 20 electrodes mounted to the distal end 12b of an elongate member 12 such that they are movable between a retracted position (Fig 2) and a deployed position (Fig 1). The first 18 and second 20 electrodes are preferably mounted on, and more preferably embedded within, flexible arms 14, 16 which together essentially define a tweezer or pincer shape. A third electrode 22, which preferably takes the form either a needle electrode or another mounted to an arm, may also be provided at the distal end 12b of the elongate member 12, and may be located at the mid-point between the first 18 and second 20 electrodes in a manner whereby the electrodes are arranged in a triangular configuration. The proximal end 12a of the elongate member is further provided with a connection means for operably connecting the electrodes to a controller comprising a single-pulse or multi-pulse generator and a multimeter.
