A device (1) suitable for portable inserting radioactive seeds for brachytherapy applications, comprising: - a body (2) substantially shaped main handpiece - a container (3) protected from radioactive seeds, received within said main body (2) and having a drum (30) rotatable configured to release one or more radioactive seeds in a given said container (3) time - means (4) for directing said drum (30) rotating, activatable by an operator - means (7) for introducing one or more radioactive seeds in a body site of interest, comprising an impeller (70) substantially in the form of wire and - means for synchronizing the release of radioactive seeds by said drum (30) rotating and said means (7) input, the overall arrangement being such that, in use, said impeller (70) pushes (s) seed (s ) radioactive (s) released (s) of said drum (30) rotatable by a drive (10) cannula, the latter connected at a first proximal longitudinal end thereof, to said body (2) main and inserted percutaneously so that a longitudinal distal end thereof is provided in the body site.Un dispositivo (1) portátil apto para la inserción de semillas radiactivas para aplicaciones de braquiterapia, que comprende: - un cuerpo (2) principal sustancialmente en forma de una pieza de mano - un recipiente (3) protegido de semillas radiactivas, recibido dentro de dicho cuerpo (2) principal y que tiene un tambor (30) giratorio configurado para liberar una o más semillas radiactivas en un momento dado de dicho recipiente (3) - medios (4) para dirigir dicho tambor (30) giratorio, activable por un operador - medios (7) para introducir una o más semillas radiactivas en un sitio del cuerpo de interés, que comprende un impulsor (70) sustancialmente en forma de alambre y - medios para sincronizar la liberación de semillas radiactivas por dicho tambor (30) giratorio y dichos medios (7) de introducción, siendo la disposición global tal que, en uso, dicho impulsor (70) empuja a la(s) semilla(s) radiactiva(s) liberada(s) de di
