Abstract: A foldable suit hanger is composed of a hooked body, a retaining seat, two arms, and two side wings. The retaining seat is fastened at one end thereof with the hooked body, and at another end thereof with the arms. The arms are fastened pivotally and respectively with the side wings. The side wings are made up of two wing bodies which are connected by a plurality of connection rods such that the wing bodies are separated by a gap greater than the width of the arms. The wing bodies are provided respectively and correspondingly in the underside thereof with a recess. The hooked body, the retaining seat, the arms, and the side wings can be folded to join together such that the hooked body is received in the recesses of the wing bodies, and that the retaining seat and the arms are received in the gap of the side wing.