Abstract: A security cabinet comprises a body of a high-strength material and at least one burglary resistant lockable door. To make the inventive cabinet sufficiently burglary resistant for storing e.g. firearms, it is designed with one main element and at least one end element attached to one end of the main element, at least one display window with a glass panel of shock-proof, burglary resistant glass sheet material being stationarily mounted in the body of the main element, whereas the burglary resistant, lockable door of the cabinet is attached to the body of the end element and forms at least part of the corresponding end wall of the cabinet. The display window is mounted by being clamped between a circumferential frame made of a high-strength material and arranged on the outside of the body, and a circumferential, torsionally rigid frame section on the inside of the body. The frame engages the body outside, and the frame section is attached to the body inside to form a mounting groove for the glass panel.