To provide a clip tingle which can lay roof boards for arch-shaped roof with a high design effect effectively and without rattling.

A long roof board 1 for arch-shaped roof is equipped with the first and the second engaging force 3, 4 on both side edges of the body 2 of roof board, and the first engaging piece 3 is composed of a body side ridge 3a protruding toward the roof board body 2, an approx. inverted U-form part 3b, and an edge side ridge 3c protruding oppositely to the roof board body 2 while the second engaging piece 4 is composed of a body side ridge 4a protruding toward the roof board body 2, an approx. inverted U-form part 4b, and an edge side ridge 4c protruding oppositely to the roof board body 2. A lip tingle 5 of short size is provided to fix the roof board 1 to a roof underlay material 6 and is composed of an angle piece 5a constituting a engaging part 5aa where the two ends contact with the rear surfaces of the ridges 3a, 3c of the first engaging piece 3, a riser part 5b folded downward from near the crest of the angle piece 5a, and a fixation part 5c which is folded at a right angle from the riser part 5b and fixed to the underlay material 6.