Device (1) for brachytherapy comprising: - a guiding matrix (3) for brachytherapy needles (5), intended to be placed in contact with the perineal area of a patient, and having guiding channels (4) through which said needles can be inserted (5), - a support (2) intended to be fixed removably to an ultrasound probe (6) for brachytherapy, and - fastening means (7) for fastening said guide matrix (3) with said support (2) removably, Characterized in that said guide matrix (3) is coupled to said support (2) by means of a coupling (8) that allows the rotation of said matrix (3) with respect to a vertical axis (14) that extends along said matrix (3) between an upper end and a lower end, wherein said fastening means (7) hold said guiding matrix (3) by said coupling (8) and present a blocking position, wherein said matrix (3) ) is fixed with respect to said support (2), a rotation position, in which said matrix (3) can rotate around said vertical axis (14), and a release position, in which said matrix (3) can be separated from said support (2). (Machine-translation by Google Translate, not legally binding)1. Dispositivo (1) para braquiterapia que comprende: - una matriz (3) de guiado para agujas (5) de braquiterapia, destinada a colocarse en contacto con la zona perineal de un paciente, y que presenta unos canales (4) de guiado por los que pueden ser introducidas dichas agujas (5), - un soporte (2) destinado a fijarse de forma amovible a una sonda (6) de ultrasonidos para braquiterapia, y - unos medios de sujeción (7) para sujetar dicha matriz (3) de guiado con dicho soporte (2) de forma amovible, caracterizado porque dicha matriz (3) de guiado se acopla a dicho soporte (2) mediante un acoplamiento (8) que permite el giro de dicha matriz (3) respecto a un eje vertical (14) que se extiende a lo largo de dicha matriz (3) entre un extremo superior y un extremo inferior, en el que dichos medios de sujeción (7) sujetan dicha matriz (3) de guiado por dicho acoplamiento (8) y prese
