A prefabricated hybrid construction panel (1, 1'), in particular for building facade, said panel being defined at least by an outer face and an inner face, a thickness separating the outer and inner faces, two lateral edges and two longitudinal edges, including a lower edge and an upper edge, said construction panel being made of at least two different construction materials, a first and a second construction material, having complementary physical properties, characterised in that said construction panel (1, 1') comprises at least: - a panel body, compressed, made of said first construction material, less dense and less mechanically resistant, but more thermally resistant than the second construction material, - a framework, ribbed and reinforced, embedded in said panel body, made of said second construction material, denser and more mechanically resistant, but less thermally resistant than the first construction material, and - formwork planelles (11, 12) arranged to cast, on site, junction zones with other construction panels and/or a floor of the building, said formwork planelles being formed in said panel body, and being intrinsically heat-resistant, so as to create a thermal bridge break at said junction zones, and - in that said framework and said panel body are intimately connected by overmoulding so as to form a one-piece, stackable, transportable and self-supporting construction panel, and in that said first construction material is a biosourced concrete, and said second construction material is a reinforced concrete, said biosourced concrete comprising a mixture of vegetable fillers, mineral binder and water. characterised in that said construction panel (1, 1') comprises at least: - a panel body, compressed, made of said first construction material, less dense and less mechanically resistant, but more thermally resistant than the second construction material, - a framework, ribbed and reinforced, embedded in said panel body, made of said second construction material, denser and more mechanically resistant, but less thermally resistant than the first construction material, and - formwork planelles (11, 12) arranged to cast, on site, junction zones with other construction panels and/or a floor of the building, said formwork planelles being formed in said panel body, and being intrinsically heat-resistant, so as to create a thermal bridge break at said junction zones, and - in that said framework and said panel body are intimately connected by overmoulding so as to form a one-piece, stackable, transportable and self-supporting construction panel, - a panel body, compressed, made of said first construction material, less dense and less mechanically resistant, but more thermally resistant than the second construction material, - a framework, ribbed and reinforced, embedded in said panel body, made of said second construction material, denser and more mechanically resistant, but less thermally resistant than the first construction material, and - formwork planelles (11, 12) arranged to cast, on site, junction zones with other construction panels and/or a floor of the building, said formwork planelles being formed in said panel body, and being intrinsically heat-resistant, so as to create a thermal bridge break at said junction zones, and - in that said framework and said panel body are intimately connected by overmoulding so as to form a one-piece, stackable, transportable and self-supporting construction panel, and in that said first construction material is a biosourced concrete, and said second construction material is a reinforced concrete, said biosourced concrete comprising a mixture of vegetable fillers, mineral binder and water.