PURPOSE: To control the distribution of raw material charged into a bell-less blast furnace in the radial direction of the furnace.

CONSTITUTION: At the time of charging the raw material 1 discharged from a flow rate adjusting gate 22 arranged at the lower part of a furnace top hopper 20 into the furnace while turning a turning chute variable in a tilting angle θby a fixed turning velocity ω, the raw material charged quantity per unit length of dropping point locus Wd=WO/LO is obtd. from the total length (LO) of the dropping point locus in a plane when the raw material 1 charged from the turning chute 24 collides against the upper surface of the charged material in the furnace and the total charged wt. (WO) of the raw material in this batch. The opening degree of the flow rate adjusting gate 22 is controlled so that this Wd becomes the constant to balance the distribution in the radial direction of the furnace. By this method, the thickness of an ore layer at the center part in the blast furnace is reduced and the furnace core part is activated.