Abstract: A cock has a handle (17) for rotating the cock plug (3) by means of a stem (5), and between the handle (17) and the stem (5) a gear transmission (22,37) is arranged. One part of the gear transmission consists of a gear wheel (22) centrally secured in the handle, and the handle (17) is shaped as a part of the housing which together with a housing element (8) form a cavity (21) wherein the gear transmission (22,37) is arranged. The housing element (8) is non-rotatably connected with the housing (1) of the cock. In order to obtain a simple and compact gear transmission the handle (17) is arranged with each central axis (26) displaced parallel to the axis (6) of the stem (5), and moreover the stem (5) is non-rotatably connected with a gear wheel sector (24) at the axis (25) of the sector. Furthermore, the teeth (37) of the gear wheel sector (24) engage with the teeth of the gear wheel (22) on the handle (17).