A traffic sign board pillar is provided to minimize casualties and to decrease impulse quantity delivered to passenger. A traffic sign board pillar comprises plural through-holes in which a foundation bolt can pass through is equipped in the edge part in order to be fixed to and combined with the upper side of the foundation(B) which is under construction in floor, a base plate(21) in which a penetration hole is formed in the central part, a foundation post(22) in which the bottom part is inserted and united in the penetration hole of the base plate and standing erect, and a main post(23) in which a cut-off groove(G1) having a V-shaped notch type cross section along the circumference in the outer circumference above the upper end of the basis pillar is formed.
