A connector is used with a pair of hollow rails having longitudinally confronting ends and each forming a downwardly open longitudinal slot and having a pair of upwardly directed support faces flanking the slot. A hanger has a head longitudinally displaceable inside the rails on the support faces thereof, a body projecting through the slot downward out of the rails, and a horizontally projecting guide flange immediately below the rails and at a predetermined spacing below the head. The hanger is adapted to carry a curtain below the rails. The connector has a flat, vertical, and transversely extending body plate between the rail ends and a pair of flat guides fixed to the body plate below the rail ends, extending between and longitudinally overlapping the rail ends, and each having a generally horizontally extending upper face engageable with the guide flange on sliding of the hanger between the rails and subdivided into a downwardly inclined end region extending at a small acute angle to the support faces and a center region substantially parallel to the support faces. The guides are transversely spaced and separated by a longitudinally extending gap directly below the slot having a widened end. The center regions of the upper faces are spaced below the support surfaces by a distance shorter than the spacing between the guide flange and the head such that as the guide flange rides up the end region the head is lifted up off the support faces.