A sunroof device with a water-drainage structure, comprising: a fixed panel body and an openable panel body which close an opening formed in a fixed roof of a vehicle; a frame (2, 3, 4) being arranged along an edge of the fixed roof and including a drainage groove; a bracket being attached to the frame (2, 3, 4) and supporting the fixed panel body; characterized in that the sunroof device further comprises: a drainage-guide plate being interposed between the fixed panel body and the bracket, and guiding, to the drainage groove, rainwater or the like which intrudes along a sealing interface between the fixed panel body and the edge of the fixed roof; wherein the support of the fixed panel body by the bracket is achieved by a holder firmly fixed to the fixed panel body, and a holder extension arranged at a leading edge of the holder, wherein the drainage-guide plate, and the bracket are fastened together with a first fastening member (6a, 6b), and a panel-support member being interposed between the holder extension and the drainage-guide plate, wherein the panel-support member is fixed to the drainage-guide plate and the bracket by means of the first fastening member (6a, 6b), and also fixed to the holder extension by a second fastening member (7a, 7b). a fixed panel body and an openable panel body which close an opening formed in a fixed roof of a vehicle; a frame (2, 3, 4) being arranged along an edge of the fixed roof and including a drainage groove; a bracket being attached to the frame (2, 3, 4) and supporting the fixed panel body; characterized in that the sunroof device further comprises: a drainage-guide plate being interposed between the fixed panel body and the bracket, and guiding, to the drainage groove, rainwater or the like which intrudes along a sealing interface between the fixed panel body and the edge of the fixed roof; wherein the support of the fixed panel body by the bracket is achieved by a holder firmly fixed to the fixed panel body, and a holder extension arranged at a leading edge of the holder, wherein the drainage-guide plate, and the bracket are fastened together with a first fastening member (6a, 6b), and a panel-support member being interposed between the holder extension and the drainage-guide plate, wherein the panel-support member is fixed to the drainage-guide plate and the bracket by means of the first fastening member (6a, 6b), and also fixed to the holder extension by a second fastening member (7a, 7b). a bracket being attached to the frame (2, 3, 4) and supporting the fixed panel body; characterized in that the sunroof device further comprises: a drainage-guide plate being interposed between the fixed panel body and the bracket, and guiding, to the drainage groove, rainwater or the like which intrudes along a sealing interface between the fixed panel body and the edge of the fixed roof; wherein the support of the fixed panel body by the bracket is achieved by a holder firmly fixed to the fixed panel body, and a holder extension arranged at a leading edge of the holder, wherein the drainage-guide plate, and the bracket are fastened together with a first fastening member (6a, 6b), and a panel-support member being interposed between the holder extension and the drainage-guide plate, wherein the panel-support member is fixed to the drainage-guide plate and the bracket by means of the first fastening member (6a, 6b), and also fixed to the holder extension by a second fastening member (7a, 7b). a drainage-guide plate being interposed between the fixed panel body and the bracket, and guiding, to the drainage groove, rainwater or the like which intrudes along a sealing interface between the fixed panel body and the edge of the fixed roof; wherein the support of the fixed panel body by the bracket is achieved by a holder firmly fixed to the fixed panel body, and a holder extension arranged at a leading edge of the holder, wherein the drainage-guide plate, and the bracket are fastened together with a first fastening member (6a, 6b), and a panel-support member being interposed between the holder extension and the drainage-guide plate, wherein the panel-support member is fixed to the drainage-guide plate and the bracket by means of the first fastening member (6a, 6b), and also fixed to the holder extension by a second fastening member (7a, 7b).