A portable container, of the type of a suitcase, a trunk, a crate, a trolley, and the like, comprising a first shell portion and a second shell portion which are mutually articulated and can move between a configuration for closing an internal compartment and at least one open configuration for free access to the compartment; a safety device is coupled to the shell portions; the container also comprises an assembly for coupling the device to at least the first shell portion; the assembly is provided with: at least two inserts which are stably inserted in respective seats a slider, coupled to the device, a profiled element which is rigidly supported by the inserts and forms a guiding track for the slider, means for the rigid anchoring of the slider to the profiled element.