The invention concerns a mechanism to select the slow running condition and find the pick in looms, of the type comprising a main gearwheel (2) apt to receive and transmit the motion from and to the main shaft (P) of the loom, a driven gear (5) apt to transmit the motion to a weave machine (A), and a slow running gear (6) apt to transmit the motion from an auxiliary slow running motor ( m ). Said mechanism also comprises a single coupling gearwheel (1), apt to perform an axial translation so as to determine the simultaneous mesh between said main gearwheel (2), said driven gear (5) and said slow running gear (6), or alternatively, between the main gearwheel (2) and the driven gear (5), or between the driven gear (5) and the slow running gear (6).