The disclosed security camera includes a case body mounted on a fixed wall. A top plate is rotatably installed at one side of the case body. A movable circuit board is installed at one side of the top plate. A fixed circuit board is fixed in the case body. A camera unit is installed at the other side of the top plate. A coupling cable connects the movable circuit board and the fixed circuit board. A slip ring supports the coupling cable without being influenced by rotation of the top plate. A wire guide substantially prevents movement of the coupling cable drawn from an upper side of the top plate. A wire guide includes a wire drawing section through which the coupling cable passes. Fixing ribs are provided at one side of the wire guide to fix the coupling cable drawn through the wire drawing section to the upper surface of the top plate. The fixing ribs are installed at a certain interval to fix a core inserted around the coupling cable.