An object of the present invention relates to a ruler having a blade that can safely operate the cutting knife, the paper can be precisely cut, in the ruler engraved with a scale, can cut the paper inside the ruler (10) It is characterized in that the cutting body 20 is built so that the cutting body 20 is a blade 26 that can be cut in both directions; A body portion 24 coupled to the upper portion of the blade 26; And a pressing plate 22 coupled to the upper portion of the body portion 24.
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