Abstract: An air jet spinning machine and a drafting system unit for a spinning unit produce a thread or roving from a supplied fiber strip, with a front roller pair including a front top roller on a load carrier and a driven front bottom roller on a bottom roller carrier, and a bearing element arranged on the bottom roller carrier for movably bearing an air jet spinning nozzle. A reliable pivotable air jet spinning nozzle which can be released from the bottom roller carrier is implemented by the bottom roller carrier including a bearing element having a free end, for receiving the air jet spinning nozzle, wherein the bearing element forms a pivot axis for pivoting the air jet spinning nozzle between an operating position and a second position, wherein the bearing element is connected to a portion spaced apart from the free end on the bottom roller carrier.