The invention relates to blood processing apparatus comprising a cabinet (2) defining at least an interior housing (6) and presenting an aperture (6a) for allowing access from outside into said housing. The apparatus has a user interface (13) mounted in a movable manner on the cabinet between at least a first position, where the user interface is adjacent to the cabinet in correspondence of said aperture, and a second position, where the user interface is spaced apart from the aperture and opens the access to said housing.