Very efficient and economical treatment of textile material in a continuous loop can be carried out in an improved circular treating passageway comprised of a portion for allowing the transient residence of the textile material while transferring in an approximately horizontal position, but in a zigzag form, in a treating liquor and another portion for moving the textile material through a rapid flow of the treating liquid, wherein the residence portion is inclined so that the depth of the treating liquor increases gradually in the advancing direction of the textile material and a baffle plate is provided so that the textile material transferred with the rapid flow of the treating liquor strikes against the baffle plate at a high speed.