An apparatus for printing a mark on a rotating vehicle tire which is under uniformity test by a uniformity measuring device. The mark is printed in the form of a point exactly at a position on the tire which has a peak value in the uniformity including a force variation or run-out. The apparatus comprises a rotary shaft, a first disc member securely mounted on the rotary shaft and carrying a marking means, a second disc freely rotatably mounted on the rotary shaft and adapted to be brought into pressing contact with a tire surface for rotation therewith, and a mechanism for transmitting rotational movement of the second disc member to the first disc member through the rotary shaft upon receipt of a signal from the measuring device for running the marking means at a speed same as the circumferential speed of the rotating tire. The apparatus further includes a means for holding the marking means in its stand-by position.