To provide a tabulation ruler for a computer capable of measuring directly the list dimension in an existing print or the like as an input value inputted into the computer, enabling even a user unaccustomed to computer operation to form the same list as an original format efficiently in a short time, and having excellent office work efficiency, productivity and convenience.

This tabulation ruler for the computer for measuring the column width and the row height inputted into the computer at the tabulation time is equipped with a column width measuring graduation using a standard column pitch which is the standard of the column width as a unit, and a row height measuring graduation using a standard row pitch which is the standard of the row height as a unit.