The present invention provides a wire tightening device which is installed in shoes or the like and structured so that a tightening operation for tightening a wire can be performed with ease, and the position of a part winding the wire is lifted inside a housing. The present invention comprises: a winding wheel which is positioned in the inner space of the housing and has a vertical through hole formed in the center; and an ascending/descending member that is positioned in the through hole of the winding wheel and coupled to the winding wheel through ratchet coupling, and is provided with engagement teeth which are formed in the lower portion and interlock with locking teeth of the housing.