The invention relates to a singulator, constituted by a converger module (2), a diverger module (10) and a selector module (17) arranged sequentially. The loose articles (5) in inlet to the converger module (2) are converged towards a first central zone (7) by two adjacent roller planes. The articles resting on the central zone (7) are advanced towards a central zone (13) of a diverger module (10) and are then transported towards the outlet station (12) thereof; conversely, the articles arranged laterally with respect to the central zone (13) of the diverger module (10) are laterally distanced by means of two corresponding roller planes having rollers with inclined axes up to striking on two respective lateral walls (42, 43) suitable for moving the articles received restingly towards the outlet station (12). A selector module (17) controlled by a control unit (22) moves the articles arriving on the three advancement lines (A, B, C) in order to bring them to the outlet station (19) of the selector module (17) in a singularized configuration and not superposed along the transversal development of the singulator.