An arm construction of an intraoral X-ray device, which comprises at least elongated first (55) and second (56) support arms articulated with respect to each other in connection with a substantially located radiation source (4) at that end of the first support arm (55) which is opposite with respect to said articulation, said articulation being implemented such that the first support arm (55) has the permitted rotation with respect to an axis (60) of physical or virtual articulation that extends on a horizontal plane and (which is) defined by said articulation, characterized in that at least one of the first (55) and second (56) support arms is implemented as two pieces in longitudinal direction , in such a way that articulation structures located at the two ends of the support arms are located on a first side and that a piece (58) d is located on the opposite side to this first side e cover having a structure that can be opened or separated in the longitudinal direction of the support arm and which is substantially the length of the support arm or that covers at least a significant portion of the length of the support arm.Una construcción de brazo de un dispositivo de rayos X intraoral, la cual comprende al menos unos brazos de soporte alargados primero (55) y segundo (56) articulados el uno con respecto al otro en conexión con una fuente (4) de radiación situada substancialmente en ese extremo del primer brazo (55) de soporte el cual es opuesto con respecto a dicha articulación, estando implementada dicha articulación de tal manera que el primer brazo (55) de soporte tenga el giro permitido con respecto a un eje (60) de articulación físico o virtual que se extiende sobre un plano horizontal y (que está) definido por la citada articulación, caracterizada por que al menos uno de los brazos de soporte primero (55) y segundo (56) está implementado como dos piezas en dirección longitudinal, de tal manera que estructuras de articulación situadas en los dos extremos de l
