To provide a cutter for an unnecessary edge produced in a manufacturing process of furniture or fittings, and having superior economical efficiency.

This edge trimmer consists of: a holder 1 that includes a ruler part 11 with an angle section formed of two substantially orthogonal guide faces 11A and 11B, and blade body attachment parts P provided corresponding to both end portions 11a and 11b of the ruler part 11 respectively; and blade bodies 2 detachably attached to the respective blade body attachment parts P. When the cutting property of the blade body 2 is deteriorated due to the long-period use, this cutter can be reused by re-polishing the blade body 2 alone, when the blade body cannot be re-polished further due to the repetition of the re-polishing, only the blade body 2 is replaced by a new one, and the holder 1 can be continuously used. This constitution is extremely economical compared with, for example, a conventional edge trimmer required for replacing the whole body of the edge trimmer.