A convection heating device for an oven cavity of a cooking oven, wherein: - the convection heating device comprises a radial fan, at least one heating element, a fan cover and the rear wall of the oven cavity, - the radial fan and the heating element are arrangeable or arranged between the fan cover and the rear wall of the oven cavity, - at least one main plane of the fan cover extends parallel to the rear wall in the mounted state of said fan cover, - the fan cover comprises an inlet section arranged in a central portion of said fan cover, - the inlet section includes a plurality of holes and/or slots, - the fan cover comprises an outlet section arranged in an outer portion of said fan cover, - the outlet section includes a number of cut-outs, - the inlet section and outlet section are arranged in the main plane of the fan cover, - the fan cover comprises a side wall enclosing a border of said fan cover and extending rearwards from the main plane of said fan cover, - the cut-outs of the outlet section have longitudinal shapes, - the longitudinal axes of the cut-outs of the outlet section are inclined with respect to corresponding reference axes perpendicular to radial directions originating from the centre of the fan cover and passing the centres of the cut-outs, and wherein said reference axes extend within the main plane of the fan cover, - at least one cut-out of the outlet section comprises a deflecting plate extending rearwards from that longitudinal side of said cut-out, which is the closest longitudinal side to the centre of the fan cover, in particular wherein said deflecting plate is placed upstream to the flow direction, and - at least one longitudinal side of the cut-outs of the outlet section is curved, - the at least one deflecting plate is curved, - and wherein said curved deflecting plate has the same curvature as the corresponding curved longitudinal side of the cut-out, characterised in that the at least one curved longitudinal side of the cut-out of the outlet section is concave to the centre of the fan cover. - the convection heating device comprises a radial fan, at least one heating element, a fan cover and the rear wall of the oven cavity, - the radial fan and the heating element are arrangeable or arranged between the fan cover and the rear wall of the oven cavity, - at least one main plane of the fan cover extends parallel to the rear wall in the mounted state of said fan cover, - the fan cover comprises an inlet section arranged in a central portion of said fan cover, - the inlet section includes a plurality of holes and/or slots, - the fan cover comprises an outlet section arranged in an outer portion of said fan cover, - the outlet section includes a number of cut-outs, - the inlet section and outlet section are arranged in the main plane of the fan cover, - the fan cover comprises a side wall enclosing a border of said fan cover and extending rearwards from the main plane of said fan cover, - the cut-outs of the outlet section have longitudinal shapes, - the longitudinal axes of the cut-outs of the outlet section are inclined with respect to corresponding reference axes perpendicular to radial directions originating from the centre of the fan cover and passing the centres of the cut-outs, and wherein said reference axes extend within the main plane of the fan cover, - at least one cut-out of the outlet section comprises a deflecting plate extending rearwards from that longitudinal side of said cut-out, which is the closest longitudinal side to the centre of the fan cover, in particular wherein said deflecting plate is placed upstream to the flow direction, and - at least one longitudinal side of the cut-outs of the outlet section is curved, - the at least one deflecting plate is curved, - and wherein said curved deflecting plate has the same curvature as the corresponding curved longitudinal side of the cut-out,