A method and apparatus for establishing a device-to-device (D2D) connection in a wireless communication system is provided. A first mobile device may transmit an identity of a network node to a second mobile device. In this case, the first mobile device and the network node are connected by a first connection, and the first mobile device and the second mobile device are connected by a second connection. Or, a base station may transmit information on a D2D connection between mobile devices which are connected to the base station, to a neighboring network node. The information on the D2D connection includes at least one of information on the mobile devices, and a D2D mode.