PROBLEM TO BE SOLVED: To solve the problem that a conventional sign is deformed or damaged and cannot be recycled owing to a violent handling in installation, removal and movement although the sign for roadworks is thrown away currently but a product having excellent durability or being capable of being recycled by repair has been required as the tendency of an age. SOLUTION: In the sign for roadworks, the problem is solved by providing the sign for roadworks in which the base material of the sign in which a retroreflection sheet displaying display contents such as characters, numerals, symbols or the like is laminated is changed into a plastic board from a galvanized sheet while the retroreflection sheet being used as a sign surface, being most expensive and being easy to damage is protected by a protective film, the sign can be reproduced by exchanging the retroreflection sheet and a holding rail capable of simply exchanging the sign or the protective film without damaging the retroreflection sheet is mounted on an iron frame as a mounting mechanism.
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