Abstract: This collector comprises a reflector (1) formed by a plurality of reflecting elements (6) engaged between consecutive frames (2). Each of the frames is formed by two members (7) moulded from Zanak and fixed to an aluminium beam (11) having a triangular cross-sectional shape. Each pair of members (7) defines arms (17) whereby the reflector is rotatively mounted on a fixed absorber tube (3). The latter is protected by a transparent hood (28) fixed on supports (4) disposed on each side of the reflector. A device (34, 35, 37) for adjusting the angular position of the reflector is provided at at least one end of the collector.