To provide a ridge tile having a locking structure hardly causing displacement even by application of a large force or shock such as a typhoon or an earthquake as the ridge tile based on only a stacking structure basically.

In a ridge tile main body 11 shaped into an angle shape substantially in a front face view, one side is formed as an overlapped part 12 having a large opening part 13, while the other side having a small opening part 15 is formed as an insertion part 14 inserted into the large opening part. On both sides in the vicinity of the lower edge inside the large opening part in the overlapped part, engagement projection pieces 20 are projected, while engagement cutout parts 25, to which the engagement projection pieces are fixed, are arranged on both sides of the lower edge vicinity on the outside of the insertion part. An abutting part 30 for bringing an end edge 14 on the insertion part 14 side into contact with it is formed inside the large opening part 13.