To provide an implement for being mounted on a roof, which enables a sandwiching implement to be surely mounted in a sandwiching manner on a bolt body with a sufficient sandwiching strength, even when the bolt body serving as a sandwiching implement mounting object is not provided with a property of being mounted in a sufficiently sandwiched state, for example, due to damage to a screw thread.

This implement A for being mounted on the roof includes a pipe-like body 31 which comprises a slit 31a for reducing a diameter, and a flange piece 31e. Structurally, the sandwiching implement 1 has a sandwiching piece 13 mounted in a sandwiching manner on the pipe-like body 31 attached to the bolt body B, so as to reduce the diameter of the pipe-like body 31, and has the sandwiching piece 13 locked and fixed to the flange piece 31e of the pipe-like body 31.