A string LED light including a plurality of LED lights connected to each other by wires which includes a holder, a case, a heat sink received in the case, an LED driver electrically connected to the holder and received in the heat sink, a lampshade and a shell. The holder includes a rib and the case includes a supporting portion and a sliding groove alternatively connected with the supporting portion. The rib slides into the supporting portion from the sliding groove to abut against the supporting portion so that the holder is positioned on the case. The shell passes through the lampshade and the case to connect the shell, the lampshade and the case together. Comparing to a conventional fragile incandescent lamp, an integral configuration without assembly or disassembly and time and effort saving are obtained, the shell protects the lampshade from being crash, and the heat sink improves heat dissipation effects.