To provide a column row kneading device and a column row wall construction method, for enhancing construction efficiency, while securing water cut-off performance.

An auger kneading device forms a column row kneading wall in a state of superposing a plurality of columns in the ground, by vertically arranging a plurality of auger kneading shafts in parallel. The auger kneading shafts are composed of a central rotary shaft and a spiral blade arranged in a part of the rotary shaft. This invention provides the column row kneading device characterized by arranging a cutting tool in a state of projecting in the continuous direction of the auger kneading shaft on the rotary shaft of the auger kneading shaft positioned on both ends.