This chapter describes various gaseous tracking detectors that are used to measure particle trajectories with high precision. First, we discuss planar multi-wire proportional chambers (Sect. 4.1) followed by planar drift chambers (Sect. 4.2). These chambers are still used in fixed-target experiments and in endcaps of colliding-beam detectors. For usage in the central region of colliding-beam experiments, cylindrical chambers are necessary. Thus, we continue our discussion with cylindrical drift chambers (Sect. 4.3), jet drift chambers (Sect. 4.4) and time projection chambers (Sect. 4.5).