PURPOSE: To prevent generation of rust of a sunroof frame, and expand a head clearance.

CONSTITUTION: A leg part 29 of a frame seal 28 is fixedly arranged in an upper edge part 27 reaching the vicinity of the reverse 25 of a roof 1 of an outer peripheral wall 26 of a sunroof frame 4, and a part between the sunroof frame 4 and the roof 1 is sealed. The leg part 29 of the frame seal 28 is extended along an inside surface 34 of the outer peripheral wall 26 toward a bottom wall 23 of the sunroof frame 4, and a drain ditch part 36 having an almost U-shaped cross section is integrally formed in the extending part 35. Therefore, water does not directly contact with the sunroof frame, and generation of rust of the sunroof frame can be prevented, and a bottom wall of a drain ditch can be formed in an almost plane shape without recessing the bottom wall of the sunroof frame, and an indoor side head clearance can be expanded.