Abstract: An apparatus for cultivating tissue cells or microorganisms in suspension, in a manner which ensures formation of an axially symmetric vortex motion of liquid with an axial countercurrent flow in the cell suspension without stagnant zones at various locations. The apparatus has guide elements that stabilize the position of an annular partition with respect to the surface of the suspension, including first blades and second blades. The first blades are attached to the upper surface of the partition with the help of the first struts. The second blades are attached to the lower surface of the partition with the help of the second struts. Each of the first blades and the second blades is provided with a clamping device of “screw-nut” or collet type for varying the angle of attack with respect to the incoming flow of gas and liquid and for securing to the respective strut on the upper surface of the annular partition and at the lower surface of it.