A device for expelling bees from a bee hive, the bee hive having a portion containing at least one bee frame, the device comprising: a board for covering the portion of the bee hive, the board having a bottom side to face towards said portion, the board further comprising an inlet for receiving an air flow and at least two outlet slits arranged at the bottom side for directing at least a part of the air flow into the portion of the bee hive, a conduit system connecting the inlet and the at least two outlet slits, the outlet slits extending over a length of the at least one bee frame.