A cooling air guide is disposed in a computer for cooling a heat-generating component, such as, for example, a processor. The cooling air guide has a connecting part through which cooling air enters, and a hood that is U-shaped in cross section and can be placed over the component to be cooled and through which the cooling air is conducted from the connecting part to the cooling component. In order to be able to use the hood for different types of processor and different processor positions on the motherboard and to compensate for tolerances, the hood is fastened, according to the invention, moveably to the connecting part.