An anchor is provided for securing the upper extremity of a bunk ladder to an elevated support. A bracket is attached to the upper extremity of the ladder and has a configured hook extending downwardly and outwardly. A socket attached to the overhead support has an overhanging lip and a shoulder located therebeneath and spaced therefrom. The bracket hook is inserted between the lip and shoulder which together vertically immobilize the bracket and prevent withdrawal of the bracket hook therefrom when the foot of the ladder is in a supporting position.
