A spinning frame is disclosed of the kind having two confrontingly mounted spindle rows and three movable bars for each of said rows, which are adapted, respectively, to support the slider-carrying rings, the antiballooning containers and the thread guides, the improvement consisting in that the three movable bars enumerated above, relative to one of said rows, are made mechanically independent of the three bars relative to the other row. Thus the space comprised between the two fronts of the machine becomes freely available and is permitted to house ancilliary apparatus such as cleaning devices.