To provide a producing technique for sintered ore, by which high crystallization water-containing ore having ≥4.0 wt.% crystallization water at ≥25% in B powder for sintering, is used and the sintering operation is stably executed.

A moisture-adding treatment of a water spraying, etc., is applied to the high crystallization water-containing ore 7 as the pretreatment, and this ore applied with this treatment is charged into a raw material blending vessel 8. Successively, this ore is blended with the raw material for sintering other than the above treatment ore, mixed and granulated, and the granulated raw material for sintering ore is charged into a fire-grate shifting type sintering machine 14 and sintered. The moisture-adding treatment is performed on a conveying device from a powdery ore yard to a raw material blending vessel 8 or at the powdery ore yard. The ratio of the whole high whole high crystallization water-containing ore possessed in the B powder is made to ≥50 wt.%, and when the crystallization water content before the moisture-adding treatment is ≥7 wt.%, the whole moisture content in the high crystallization water- containing ore, is adjusted so as to increase ≥1.0 wt.%, by this treatment.