Abstract: A housing system for gas turbines, especially vehicle gas turbines, according to which in a main housing for a gas turbine there is detachably arranged a housing which includes a bell-shaped bearing housing section provided at its radially largest portion with a cast-on bearing wall, and a compressor housing section and a cover pertaining to the compressor housing section. This cover forms a partition between the compressor intake chamber and the transmission chamber in the bell-shaped bearing housing section. When viewing in the direction toward the bell-shaped bearing housing section, the cover is preceded by the compressor housing section, and the compressor housing section and the cover and the bearing housing section are successively and detachably connected to the main housing and coaxially guided and centered thereby.