Disclosed is an elevating fire hydrant assembly. The elevating fire hydrant assembly includes: a water pipe which supplies firefighting water in accordance with the open or shut operation of a water control valve buried underground; an elbow pipe connected to the water pipe; a fixing pipe connected to the elbow pipe; an elevating pipe which is coupled to the fixing pipe to retract into or extend from the ground, and the lower end of which is coupled to a guide block that slides along the inner surface of the fixing pipe; a sealing plate coupled to the top of the fixing pipe to prevent the elevating pipe from escaping; a head block which is coupled to the top of the elevating pipe, and which has a hose connector for connecting a firefighting hose; and valve means for opening or shutting the lower end of the elevating pipe.