PURPOSE: To enable the rapid and easy scribing of high accuracy by enabling the finger-touch changing of the directions of scriber in the respective directions of vertical, horizontal, and transverse.

CONSTITUTION: The scriber holder 7 fixed to the end of a horizontal leve 6 of a three-dimensional measuring machine has a shaft 9 which is inserted and fixed into the shaft hole by way of a sleeve 8, and a collar 10 is integrally formed to the central circumference of the said shaft 9. The two positioning holes 11 spaced at a distance of 90° are pierced to this collar 10 and radial slits 12 are provided thereto. Further, a stop 24 to stop the revolution of an annular member 15 and a scriber support member 25 are provided and both ends of the support member 25 are rotatably supported to a front frame 17 by way of a fulcrum shaft 26. A scriber insertion hole 27 is formed to the support member 25 and the scriber 28 inserted into this insertion hole 27 is so arranged as to be fixed by means of a lock screw 29.