Rantau Panjang–Sungai Golok Bridge (Malay: Jambatan Rantau Panjang-Sungai Golok, Thai: สะพานโก-ลก), popularly called the "Harmony Bridge" (Malay: Jambatan Muhibah), is a road bridge crossing Kolok River (Malay: Sungai Golok) of the Malaysia-Thailand border, connecting Rantau Panjang town in Kelantan, Malaysia, with Su-ngai Kolok town in Narathiwat, Thailand; spanning to the south of cross-border railway bridge nearby. The bridge is a part of Asian highway network AH18, including Thailand Route 4056 and Federal Route . It was jointly built by the governments of both countries, and was officially opened on May 21, 1973 by both Malaysian Prime Minister Tun Abdul Razak bin Haji Dato' Hussein Al-Haj and Thai Prime Minister Field Marshal Thanom Kittikachorn.