Abstract: The present invention relates to a device for the transfer of samples of micro-quantities of liquids, of the type which has a set of aspiration/delivery nozzles (15 to 22) communicating by means of flexible tubes with one or more syringes provided with a motor-driven piston, said nozzles (15 to 22) being mobile and supported by some mechanical means allowing one to modify the spacing between two consecutive nozzles (15 to 22) continuously and with constant spacing, said mechanical means having a number of identical deformable crosspieces arranged in parallel planes, each crosspiece being formed by a set of arms articulated at their intersections for the modification of the spacing between the nozzles, the nozzles being located at least at certain nodes, the nodes being aligned in a direction perpendicular to the planes of said crosspieces in order to form an equidistant grid of nodes with variable spacing increment allowing continuous variation between a minimum spacing and a maximum spacing.