A sectioning tool for sectioning the hair on a person's head allows individual sections of hair to be easily, quickly and thoroughly treated with chemical solutions such as hair colors, tints or relaxers. The tool includes a base member having two substantially perpendicular legs, one of which is used to secure the tool in the hair next to the scalp. A plurality of finger means are individually movably mounted on the second leg from a first position where they divide the hair into a plurality of sections and to a second position so that the section of hair held between individual ones of the finger means is released for treatment.