To prevent the exposure of an aluminum material by a surface cover material while surely fixing a bead so as not to be slipped off and to reduce width.

In the panel-holding section structure, sheet-shaped bead cover materials 13 and bead slipping-off preventive members 14 are connected continuously in succession while being integrally extended from the base end sections of glazing gaskets 12, and frame materials 2A and beads 9 are coupled by mutually engaging separately formed engaging pieces 3a, 9c, 3b, 9d. Inserting grooves 11 for preventing the slipping-off of the beads opened in the external direction along a panel surface are formed among the frame materials 2A and the beads 9 respectively, the outdoor side faces of the beads 9 are covered with the sheet-shaped bead cover materials 13 extended from the glazing gaskets 12, and the bead slipping-off preventive materials 14 are fitted into the inserting grooves 11 for preventing the slipping-off of the beads and the beads 9 are fixed.