An endoscope (1) with an endoscope shaft (3) in which an illumination device (11) and a rotatably mounted image sensor (12) are arranged in a distal region (8) is provided, and includes a handle (2) in which a rotatably mounted heat sink (16) is arranged, wherein the image sensor (12) is thermally connected to the heat sink (16), for conjoint rotation therewith, via a heat transmission element (15).