A detector bar, a detector formed from a number of detector bars, and a computed-tomography unit including such a detector is disclosed, each detector bar being formed from a number of individual modules. A detector bar has a module carrier for mechanically retaining the individual modules, and a printed circuit board, structurally separate from the module carrier, for making electric contact with the individual modules. The individual modules can thus be exchanged without disturbance, and simple aligning of the individual modules can thus be carried out while electric contact is simultaneously made.