A space divider (4) of a milking parlor arrangement (1, 1', 1'', 1''') for at least one milking parlor (3) for milking milk-producing animals (T), wherein the space divider (4) is arranged approximately parallel to a longitudinal axis of the animal (T) to be milked, has an arm device (6) having a milking cluster (5), which can be adjusted from a parking position to a working position and back. The arm device (6) is arranged with the milking cluster (5) in the parking position in the space divider (4) and can be adjusted into the working position laterally to the animal (T) to be milked between the front and rear legs thereof. The space divider (4) is designed in such a way that no additional space is required between adjacent animals (T), so that many animals (T) can be milked in a milking parlor arrangement (1, 1', 1'', 1''') while the smallest possible amount of space is required.
