A system for the division of locks of hair comprising a first and a second dividing member (2a, 2b; 102; 202; 302; 402; 502; 602a, 602b; 702; 802a, 802b), each of which comprises, in turn, a rigid support (3a; 3b; 103; 208; 303; 403; 503; 603a; 603b; 708; 803a; 803b) and at least one holding member (4a; 4b; 104; 204; 304; 404; 504; 604a; 604b; 704; 804a; 804b) for randomly separating strands of hair (C1; C2) from a lock of hair (C).