A self-ligating bracket for orthodontic treatment, which includes a closed housing on the bracket body for a sliding lock, which prevents the sliding lock from slipping from the bracket body when unlocking, and a system for fixing the sliding lock on the bracket using a straight groove on the bracket body which enables the opening of the sliding lock without turning a specific key, or an arc-shaped groove on the bracket body, which enables the opening of the sliding lock by turning a specific key.