Abstract: Telescopic hanging rack structure including a first bar, a second bar and a coupling unit. The outer faces of the first and second bars are formed with an axial locating ribs which are cut with multiple notches at equal intervals. The outer ends of the first and second bars are connected with hanging hooks via circular adapters. The coupling unit is composed of a left and a right casings mated and locked with each other by screws. The inner wall faces of the left and right casings are respectively formed with two-stage recesses with different curvatures, whereby after the first and second bars are fitted with each other, the first and second bars are firmly inserted and located in the left and right casings. A corner of each casing is formed with a through hole in which a press member fitted with a resilient member is disposed. The resilient member via a stop plate is located in the casings.