Abstract: The present invention provides a security device for boxes. The security device includes a cabinet device defining an enclosure for safekeeping a box containing, for example, valuable materials. The cabinet device includes side walls, a rear wall, a front wall and a bottom base. The cabinet device has an open top section into which a bottom portion of the box which is to be secured is inserted into the upper inner portion of the cabinet device. The bottom base includes a locking device for securing the cabinet onto a supporting surface such as a floor. The front wall includes a drawer removably secured to the front wall. The cabinet includes releasably interlocking devices at the upper inner portion of the walls to secure the box onto the cabinet which is secured onto a support surface such as, for example, the floor.