Abstract: A stationary mixing machine for mixing various fluid materials in a line. In a fluid path, a pair of mixing element portions 2 and 3 is concentrically arranged. At a surface formed by overlapping these mixing element portions 2 and 3, a respective fluid path is formed as mixing chambers 8 (13) at the both elements. These mixing chambers are peripherally, radially and concentrically, arranged. Fluid material flown from an opening 5 provided at a central portion of one of the mixing element portions 2 and 3 is flown in a radius direction, the juxtaposed mixing chambers in the adjacent rows can be communicated each other and a shearing stress is applied by providing a partition or a step so as to accomplish uniformly mixed and finely-dividing dispersing action.