An instrument, a medical-endoscopic instrument or technoscope, includes a shank (2) and an instrument head (10), which is arranged at a distal shank end of the shank (2) and is bendable relative thereto via a joint. The instrument head (10) includes a tool with two jaw parts (20, 22) which are pivotable relative to one another and are coupled in each case to two pull cables (70, 72, 76), for the control of the jaw parts (20, 22). These pull cables (70, 72, 76), in the region of the joint, are guided around two deflecting rollers (78, 80, 82, 84, 86, 88, 90, 92). Deflecting roller pairs are arranged on both sides of a middle axis (A) of the instrument. Deflecting rollers (82, 84, 90, 92) of a first deflecting roller pair have a smaller diameter than deflecting rollers (78, 80, 86, 88) of a second deflecting roller pair.