The invention concerns a device (1) for measuring the strip tension in a metal strip, especially a steel strip, which device has a flat, level table (2), over which the metal strip can run and at one end (3) of which a plurality of measuring elements (4) is mounted, which are suitable for measuring the strip tension, where cooling elements (5) are provided, which are installed under the table (2) and with which cooling liquid, especially water, can be carried into the area of the measuring element (4). In order to secure the table against sagging in a simple way, the invention provides that the cooling elements (5) have a box-like cooling liquid tank (6), which is arranged on both sides of the metal strip on at least one support member, such that the underside of the table (2) rests directly or indirectly on the box-like cooling liquid tank (6).