Abstract: A knife having scales includes a U-shaped handle having a first shaft and a second shaft, a first fixed knife, which is coupled with the handle, a second movable knife, which is able to connect to and move along the first shaft in order to divide an object by a desired angle, and a protractor, which is possible to be put on the first shaft, and is used as a guide for dividing the object into desired numbers, each of which is equal amount, wherein scales are shown on the protractor, and wherein the scales are grouped in accordance with the number that the object is divided.