The invention relates to a control flap, in particular an exhaust gas flap for the exhaust gas flow of an internal combustion engine, which control flap comprises a flap body (12), a flap plate (16),which is held within the flap body (12) on a pivot shaft (14), which can be rotated about a pivot axis (S), a pivot drive (20) having a drive element (30) to be coupled to the pivot shaft (14), and afixing assembly (40) for fixing the pivot drive (20) with respect to the flap body (12), the fixing assembly (40) comprising a bayonet coupling (38).