To provide a vertical batter material, in which the length of a batter material can be adjusted simply and easily and which is suitable for an indoor- side concrete form board.

This vertical batter material consists of first and second square cylindrical-shaped members 11, 12 made of metallic profiles by front-rear side walls 11a, 11b, 12a, 12b and left-right side walls 11c, 11d, 12c, 12d respectivley. A dovetail groove section 13 is stripped to the external surface of the left side wall 11c of the first member 11, a dovetail section 14 fitted into the dovetail groove section 13 is stripped to the external surface of either side wall 12d of the left and right side walls of the second member 12, the first member 11 and the second member 12 are coupled in an extensible manner by the dovetail groove section 13 and the dovetail section 14 while being fixed by a locking means 15 at a place in required length, and the external surfaces of either side wall 11b, 12b of the front and rear side walls of both members 11, 12 are abutted against a concrete template 2 under the same surface state.