A milking device includes a support device (1) supporting a milking member (2) having a claw (3) and a number of teatcups (4) to be attached to a respective teat of an animal. The support device (1) includes a rear portion (6), an attachment part (9) attaching the support device to a structure, and an arm section (7) having a proximal end portion attached to the rear portion (6) and a distal end portion movable between an active position in the proximity of the animal to be milked and a rest position. A first cavity extends along the arm section and houses a retracting member for retracting the milking member from the teats of the animal. A second cavity for conveying a fluid flow extends along the arm section. The arm section includes an extruded part enclosing the first cavity and the second cavity.