Abstract: A tool for marking decorative lines or strips on a surface comprising a main frame (2) that defines a longitudinal axis (L)1 a handle (3) fixed to said frame (2), a first deposition roller (4) rotatably mounted to said frame (2) to rotate about a first substantially transverse axis (A) and having an outer peripheral portion (14) conformed for marking a line or a decorative strip (H)1 means (5) for feeding said deposition roller (4) with a pigmented liquid. The feeding means (5) comprise a second collecting roller (7) mounted to the frame (2) and made of a substantially porous material designed to absorb the pigmented liquid and transfer it in a substantially continuous and controlled manner to the first roller (4) as the latter rolls over the surface (S) to be decorated.