PURPOSE: To reduce the labor in execution of works and the costs for it when roof tiles are to be laid while anti-wind process is applied to them.

CONSTITUTION: Roof tiles 3 are thatched in overlapping one after another from the eave tip of a roof board 1 toward the ridge, and among them, one roof tile 3A is fixed to the roof board 1 by nails 5a, 5b, etc., in its overlapping part with another roof tile 3B located one bit nearer the ridge, wherein a hook pin 9 is installed upright in a single piece structure with the oversurface of the head 8 of each nail 5a, etc. The hook pin 9 is inserted from the rear into an insert hole 12 piercing the second named roof tile 3B, which bends, outward in radial direction, the hook pin 9 protruding at the front surface of the same tile 3B to as to generate fixation to the first named roof tile 3A.