Abstract: The disclosed apparatus includes a resectoscope with a novel working element stem, a novel cutting electrode for use with the stem and novel electrical features including a dielectric moving block element for reciprocating the electrode. The stem portion of the working element has a telescope channel member with a central axis and a pair of cutting electrode guide channel members spaced apart and mounted on opposite sides of the telescope channel member above its central axis. The cutting electrode consists of a single length of electrically conductive wire with a loop portion in the middle of the wire and a pair of substantially straight, flexible, parallel, spaced apart insulation covered arms having similar lengths and extending rearwardly from the loop in the same direction. The arms of the electrode are inserted within the cutting electrode channel members in the working element stem.