2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/163385We study the orientation preserving involutions of the orientable 3-dimensional handlebody $H_g$, for any genus $g$. A complete classification of such involutions is given in terms of their fixed points.Added a reference, other minor changesGeometric Topology57M60; 57S17; 55M35text