A folding clothes hanger has a body having two arms respectively provided at two sides thereof, and which are able to be extended transversely. An adjusting bar is formed at a central portion of the body and has a plurality of recesses longitudinally defined in a first face of the bar. A base for the adjusting bar movably provided in a central portion thereof, has two chambers defined in a bottom face thereof and respectively at two sides thereof, and a clip pivotally mounted at the central portion thereof. The clip has a stop formed at an upper portion thereof to engage with one of the recesses and a spring is provided between the base and a lower portion of the clip. Two hooks each have a rear end engaged in the respective chamber of the base, and a front end for attaching on a backrest of a seat or the like.