Abstract: A combustion chamber for gas turbines, especially for motor vehicles, which includes a first reaction chamber, an outlet opening of which terminates in a second coaxially disposed reaction chamber. Each reaction chamber is associated with a premixing chamber provided with an air inlet and a fuel injection nozzle. An insert surrounds the first reaction chamber and its premixing chamber and projects into a flame tube. The flame tube encompasses the second reaction chamber and an outer wall of the insert forms with an inner wall of the flame tube an annular premixing chamber for the second reaction chamber. Several fuel injection nozzles are arranged in a zone of the air inlet of the second reaction chamber.