A solar collector comprising - a plurality of evacuated tubes for the production of thermal energy, the tubes being arranged parallel to a main longitudinal direction (X-X), - a support frame for said tubes , - a plurality of glazing sheets , each associated with a tube and adapted to cover an outer side wall of said tube to prevent the solar irradiation thereof, the glazing sheets being at least partially counter-shaped in relation to said outer side wall of the tube , - movement means of said glazing sheets so as to selectively move the glazing sheets from an active configuration, in which the glazing sheets overlap the outer side wall of the tubes to prevent the irradiation thereof, to a passive configuration, in which the glazing sheets are arranged in diametrically opposite position to the active configuration, so as to promote the irradiation of the tubes , wherein - the glazing sheets comprise a movement and support end keyed coaxially to a relative tube , the movement and support end being mechanically connected to the actuating means to allow the rotation of the glazing sheets , - wherein each of the glazing sheets is mounted coaxially to a relative tube , characterised in that - each of the glazing sheets is mechanically supported by a relative tube and is arranged overall cantilevered with respect to the movement and support end thereof, wherein the relative tube constitutes the mechanical support of a relative glazing sheet , wherein the relative tube acts as a pivot and a mechanical support for the sheet itself, and wherein each of the glazing sheets has a rigid core having a curved face , counter-shaped and directly facing the outer side wall of the relative tube so as to rotate relative to the tube and rest against said outer side wall . - a plurality of evacuated tubes for the production of thermal energy, the tubes being arranged parallel to a main longitudinal direction (X-X), - a support frame for said tubes , - a plurality of glazing sheets , each associated with a tube and adapted to cover an outer side wall of said tube to prevent the solar irradiation thereof, the glazing sheets being at least partially counter-shaped in relation to said outer side wall of the tube , - movement means of said glazing sheets so as to selectively move the glazing sheets from an active configuration, in which the glazing sheets overlap the outer side wall of the tubes to prevent the irradiation thereof, to a passive configuration, in which the glazing sheets are arranged in diametrically opposite position to the active configuration, so as to promote the irradiation of the tubes , wherein - the glazing sheets comprise a movement and support end keyed coaxially to a relative tube , the movement and support end being mechanically connected to the actuating means to allow the rotation of the glazing sheets , - wherein each of the glazing sheets is mounted coaxially to a relative tube , characterised in that - each of the glazing sheets is mechanically supported by a relative tube and is arranged overall cantilevered with respect to the movement and support end thereof, wherein the relative tube constitutes the mechanical support of a relative glazing sheet , <EOS>