The utility model provides a panel structure in skylight, includes: panel (21), inner panel (23, 24, 25), this inner panel (23, 24, 25) are made by the metal sheet, and this inner panel is set up in the panel below to extend along the edge part of panel, and have downward concave yield concave part (26) and along the flange portion (27) of panel in the whole periphery extension of concave part, sealing component (30), this sealing component (30) are made by the resin mold saw lumber material that has invariable cross section, and sealing component (30) are inserted between flange portion and panel in the whole periphery of flange portion to joined to the lower surface of panel and the upper surface of flange portion, cover component (40), should cover component (40) and make by resin material, cover component (40) and fixed the panel to set to and be used for covering inner panel and sealing component.