Abstract: A joining device for a handrail having at least two connectors, each one being aimed at being inserted onto the end of a segment of the handrail, these connectors being cylindrically shaped and co-operating with each other through contact surfaces extending in a plane oriented at 45° with respect to the longitudinal axis of these connectors. These connectors are integral through connections capable of authorizing their rotation at the level of the contact surfaces. These connections are defined by a screw substantially forming the axis of rotation of the two connectors, such connections immobilizing in rotation these connectors provided for so as to be capable of being accessible through an opening ending at the level of the outer periphery of one of these connectors.