To radially cleanly cut a round food into equal pieces by a simple structure.

The subject cutting board is made of a bendable sheet 1 in which a print on the reverse can be seen through from the surface. A circle 2 is printed on the reverse of the sheet 1 and a graduation 3a of a starting point is printed on the circumference or in the vicinity of the circumference of the circle 2. Numerals 4 meaning the number of equal divisions are reversedly printed in the vicinities of a plurality of gradations 3 and 3b at angle positions equally dividing 360 degrees by optional numbers and the graduations 3a, 3 and 3b on the basis of the gradation 3a of the starting point. The numerals 4 are one-Xth where X is numbers dividing 360 degrees into equal parts of those numbers.