Flap device for an internal combustion engine having a flap housing in which an inlet and two outlets (24, 26) are formed, and a flap body which has two flap halves (64, 66) and which is arranged on a shaft which is rotatably mounted in the flap housing and from which the two flap halves (64, 66) extend on both sides, wherein a first stop and a second stop are formed in the flap housing, against each of which a flap half (64; 66) of the flap body rests in a first end position of the flap body, and a third stop and a fourth stop are formed, against each of which a flap half (64; 66) of the flap body rests in a second end position of the flap body, wherein the flap halves (64, 66) in their two end positions resting in each case with their entire outer circumferential region perpendicularly on valve seat surfaces (56, 58, 60, 62) which are formed on the stops (48, 50, 52, 54), the flap halves (64, 66) in the end positions extending essentially parallel to the valve seat surfaces (56, 58, 60, 62) characterized in that the flap body has a first inflexible flap plate and a second inflexible flap plate, between which a flexible sealing element is clamped, which projects radially over the circumference of the two flap plates (68, 70), so that an outer surface of the sealing element forms the outer circumferential region of the flap body, which in the two end positions rests against the valve seat surfaces (56, 58, 60, 62) and that the flap housing is formed as a cylindrical plug-in housing which is plugged into a receiving opening of a connection housing with the flap body and the shaft in the axial direction of the shaft and the cylindrical plug-in housing so that an inlet duct of the connection housing opens into the inlet of the flap housing and two outlet ducts (16, 18) of the connection housing extend from the outlets (24, 26) of the flap housing. and a flap body which has two flap halves (64, 66) and which is arranged on a shaft which is rotatably mounted in the flap housing and from which the two flap halves (64, 66) extend on both sides, wherein a first stop and a second stop are formed in the flap housing, against each of which a flap half (64; 66) of the flap body rests in a first end position of the flap body, and a third stop and a fourth stop are formed, against each of which a flap half (64; 66) of the flap body rests in a second end position of the flap body, wherein the flap halves (64, 66) in their two end positions resting in each case with their entire outer circumferential region perpendicularly on valve seat surfaces (56, 58, 60, 62) which are formed on the stops (48, 50, 52, 54), the flap halves (64, 66) in the end positions extending essentially parallel to the valve seat surfaces (56, 58, 60, 62) characterized in that the flap body has a first inflexible flap plate and a second inflexible flap plate, between which a flexible sealing element is clamped, which projects radially over the circumference of the two flap plates (68, 70), so that an outer surface of the sealing element forms the outer circumferential region of the flap body, which in the two end positions rests against the valve seat surfaces (56, 58, 60, 62) and that the flap housing is formed as a cylindrical plug-in housing which is plugged into a receiving opening of a connection housing with the flap body and the shaft in the axial direction of the shaft and the cylindrical plug-in housing so that an inlet duct of the connection housing opens into the inlet of the flap housing and two outlet ducts (16, 18) of the connection housing extend from the outlets (24, 26) of the flap housing.