Embodiments may be directed to an OLED illuminating apparatus including a lamp unit including a panel with an organic emission unit, a connection terminal electrically connected to the organic emission unit, and a housing coupled to the panel, the housing including a relay terminal that is electrically connected to the connection terminal; and a supporting unit detachably coupled to the lamp unit, the supporting unit supporting the lamp unit and supplying electric power to the organic emission unit by connecting to the relay terminal when coupled to the lamp unit.