Abstract: A thread storing and supplying device for textile machines, especially knitting machines comprises a housing, a driveable thread storage drum provided in the housing for supporting several windings of a thread, a thread guiding element arranged to supply a thread to the thread storage drum, and a thread brake and a knot monitor which together form a combined thread braking and knot monitoring unit located immediately after the thread guiding element as considered in a thread running direction this thread braking device includes two freely rotatable axes-parallel rollers, one of the rollers being displaceable relative to another of the rollers which is non-displaceable against a braking spring force the thread braking device also has an adjustable abutment which defines a maximum displacement value for the gap between the rollers, and the non-displaceable roller is arranged so a thread is deflected over it. The displaceable roller is mounted on a supporting means which is pivotally mounted on the housing.