An expelling device, configured to incite an animal (18) to exit from of a milking stable (14) in which the animal is standing during a milking session and in connection to which the expelling device is configured to be arranged, wherein in the milking stable (14) is of a type which has a front wall element (15) and lateral wall elements (16, 17) and is configured to house an animal (18) that is being milked in said milking stable (14) with its head directed to and close to said front wall element (15). The expelling device comprises a sheet (1) configured to move vertically from an elevated position to a position adjacent to a front end of the milking stable (14) and adjacent to a lateral wall element (16) of the milking stable (14).