A sun-roof device for use in a vehicle having a roof includes an open portion formed in the roof and having a pair of parallel spaced side peripheries each of which extends in a lengthwise direction of the vehicle. A frame is fixed to the roof so as to be located below the roof and has a pair of guide rails each of which extends along a side periphery of the opening portion. A movable panel is provided for opening and closing the opening portion and a pair of sliding members are connected to the movable panel for moving the movable panel. The sliding members are each guided in one of the guide rails so as to be slidable in the lengthwise direction of the vehicle, and a draining groove member for draining water on the frame is provided below the frame and separate from the frame.
