Abstract: A milking siphon positioner for repositioning milking equipment within a milking parlor is shown and described. A swing arm is pivotally mounted within a bearing so that it may swing in a swing arc defined in a plane which is at least substantially vertical. A milking siphon suitable for attachment to an animal's teats is carried on the swing arm so that it is repositioned by the swing arm; for example, the swing arm may reposition the milking siphon to milking platforms situated on opposite sides of milking parlors. The swing arm may be selectively affixed with respect to the bearing at selected angles within the swing arc, so that the swing arm (and milking siphon) can be locked into desired positions.