A device (10) for humidifying breathing air (11) for artificial respiration of humanoids, in particular of the human being (12) is proposed, including at least one essentially closed container (13) for receiving water (14), in which the container (13) has a first opening (15) for letting in the non-humidified air (16) and a second opening (17) for letting out the humidified air (18), and has an inlet (19) for supplying the water (14) to the container (13). To that end, it is proposed that the inlet (19) be embodied in the upper part (231) of the container, which is adjoined by a tube (27) essentially crossing through the container interior (23), and on the free end (270) of the tube (27), a valve (35) is disposed, which limits the level (21) of the water (14) supplied via the tube (27) in such a way that the container bottom (232) in the container interior (23) is essentially covered with water (14).
