The invention refers to an oil recover unit (1) having at least one container (5) for retrieval of a mixture/emulsion of mainly water (3) and oil (4) for separation of the water (3) from the oil (4). The retrieval is provided via at least one inflow (6), located at lower part (24) of the container (5), where the mixture/emulsion (2) is soaked up and under pressure pressed upwards into the container (5) by at least one pump (8) at the same time as the oil (4), which has a lower density than the water (3), floats upwards in the form of oil particles (16) in the surrounding water (3) and creates an oil bed (17) on the water (3), whereby on at least one place, where the oil particles (16) move upwards, somewhere under the oil bed (17), at least one collecting place (9) is connected in direct or indirect connection to at least one discharge canal (11), through which the surrounding water (3) in the mixture/emulsion (2), possibly containing a small quantity of oil (4), is dischargeable from the container (5), as discharged water (13), via at least one existing lower discharge (14), placed at the lower part (24) of the container (5) at the same time as the oil bed (17) is dischargeable at the upper part (12) of the container via at least one existing upper discharge (15).