To simplify tile-roofing work for a valley section of a roof, and to maintain a properly laid state of a valley tile.

In the pair of valley tiles 11A and 11B, either of overlap parts provided at an end on the side of each valley line serves as a supporting shaft part 23, and the other overlap part serves as a covering part 28 which covers the supporting shaft part 23. In this case, the covering part 28 of the valley tile 11B covers the supporting shaft part 23 of the valley tile 11A from above, so that both the valley tiles 11A and 11B can be integrated together. In this state, the covering part 28 of the valley tile 11B can be displaced in an X-direction, shown in Fig., along an outer peripheral surface of the supporting shaft part 23 of the valley tile 11A, and an angle of a top surface of each of the valley tiles 11A and 11B can be adjusted by that displacement.