A receiver for a heat exchanger, especially a condenser of a refrigerant system, is disclosed. The receiver has a hollow body and a closure closing the body. The body defines an internal volume configured to receive a fluid flowing through the heat exchanger, and the closure is adapted to establish a communication of the fluid between said internal volume and a flange of the heat exchanger. The closure is removable from the flange and detachably coupled to the body. A heat exchanger, especially a condenser equipped thereof, is also disclosed.