Distribution of pulverized coal to respective pulverized coal burners is made uniform by improving concentration distribution in the vertical direction at the inlet of a pulverized coal distributor. The pulverized coal concentration regulator comprises pulverized coal distributors (17a-17d), and a solid/gas two phase flow regulator (20) provided at the bottom in pulverized coal pipes (13a-13d) on the upstream side of the pulverized coal distributors (17a-17d) in order to regulate the concentration of pulverized coal to branch pipes (18a, 18b). The solid/gas two phase flow regulator (20) is a planar member having substantially rectangular plan view provided over the substantially entire width of the pulverized coal pipes (13a-13d) wherein the front edge is fixed rotatably for the base of the pulverized coal pipes (13a-13d), and the angle formed by the upper surface thereof and the base of the pulverized coal pipes (13a-13d) can be adjusted automatically based on a signal from flow sensors fixed to the branch pipes (18a, 18b), respectively.