Combustion chamber sectored in CMCs for gas turbine

An annular combustion chamber mounted includes an annular inner wall (10) and an annular outer wall (20) of composite material having a ceramic matrix and a chamber end wall connected to the inner and outer walls and having openings (30a) for housing injectors. connecting parts (17, 27) elastically deformable connecting the inner wall and the outer wall of the chamber to internal metal casings (15) and outer (25). The assembly formed by the inner wall, the outer wall and the bottom of the combustion chamber is circumferentially divided into adjacent chamber segments, each made of a single piece of composite material having a ceramic matrix and comprising a sector (110) wall internally, a sector (120) of outer wall and an area (130) of the chamber bottom. The connecting pieces (17, 27) connect the inner metal casing and the outer metal casing at respective inner wall section of the combustion chamber and each outer wall of the chamber sector.