Proposed is a hanger capable of being opened forward/rearward and, more particularly, to a ventilating hanger having a hanging part on which clothes can be hung and which can be opened toward front/back of clothes, so that the hanging part is in a narrow state to allow the clothes to ba easily hung thereon when the clothes are hung, and is opened to be wide forward/rearward in a state in which the clothes are hung thereon, so as to widen the space between the front and back of the clothes, and thus smooth ventilation is facilitated.