To realize a long-length material supporting tool with which a long- length material can vertically be stood without regard to the inclination of a slope in the case of standing the long-length material at the slope.

A long hole 23 having teeth in the form of internal gears formed so as to make a circle along an inner wall near the upper end of a front plate 22 constituting a fitting part 21 to be fitted to a structure such as a fence. By columnar supporting members 12 and 16, two cylindrical holding tools 11a and 11b for holding the longitudinal material are rotatably supported with the axis centers of the supporting members 12 and 16 as centers. The upper supporting member 12 is fixed to the front plate 22 by a fixing tool 31 passing through the long hole 23 from the back face of the front plate 22. The lower supporting member 16 is fixed directly to the front plate 22.