The invention comprises a score marker for tennis including a base pierced with three slots arranged in U form. Each slot is provided with a cursor associated with positioning means which in the case of the two parallel slots enables retention of the cursor in four predetermined positions so as to display the points 0, 15, 30 and 40 and in the case of the third slot enables retention of the cursor in three predetermined positions in which it indicates in the central position equality of the players and in the end positions to which player the advantage belongs.