An air guide housing for a radiator of an internal combustion engine, especially in a motor vehicle, is described which comprises a base element fixed to the radiator and a fan ring collar downstream of this in the direction of air flow and at least partially enclosing a fan, a circumferential elastic seal being provided between base element and fan ring collar. In order to avoid a connection of the fan ring collar to the internal combustion engine, the seal constitutes a connection alone supporting the fan ring collar.
