Abstract: A homogenizing mixer for stirring and homogenizing liquids such as paints, printing inks, foodstuffs, medicines and cosmetics. The homogenizing mixer has a stirring unit comprising an upper casing, a lower casing fixedly joined to the upper casing, a fixed shearing plate fixedly held between the upper casing and the lower casing, a rotary shearing disk fixedly mounted on a rotary shaft having a lower end extending within the stirring unit and an upper end operatively connected to driving means, so as to be positioned under the fixed shearing disk with a small clearance therebetween, and a propeller fixed to the lower extremity of the rotary shaft to suck a liquid into the stirring unit and to urge the liquid toward the fixed shearing disk and the rotary shearing disk so as to be discharged from the stirring unit. The clearance between the fixed shearing disk and the rotary shearing disk is adjusted properly according to the properties of the liquid.