A security container (1, 50) for holding and displaying an article (2, 55) such as a package containing a compact disc, audiocassette or videocassette, comprised of a base (3,51) and a pivotally mounted lid (4, 52). The base has an external size and shape generally equal to that of the article to be secured within an interior compartment formed by the base. The lid is pivotally mounted on the base by a pair of posts (26) located on side walls of the base which are spaced from one of the end walls a sufficient distance to provide an end of the container having a thickness equal to the thickness of the article contained therein. This thickness of the end of the container enables the container to be placed within a display rack heretofore useable only for an unsecured package. A recess (48, 56) is formed in an inside surface of the lid for receiving and protecting a security detection device within the container. A lock (30) is formed on the inside of the base by a plurality of flexible fingers (31) which are formed on the lid and which are engageable with angled projections formed on the base. Key openings (39) are formed in the base in alignment with the angled locking projections whereby a key can be inserted through the openings to remove the flexible fingers from the projections to unlock the lid to remove a cassette from the storage container.