A gas intake device for letting gases into an inlet volume of a cylinder head of a motor vehicle combustion engine includes a valve (10) for supplying the cylinder head with gas, this valve communicating with the inlet volume of the cylinder head directly and indirectly via a heat exchanger (14). The valve (10) and the heat exchanger (14) are mounted on a plate (21) intended to be mounted directly on the cylinder head. The device is compact and relatively insensitive to vibration.