Abstract: An improved cassette container including a rectangular body which is open on a front side and is closed on the five other sides. The left and right side walls extend outwardly on either side of the opening to accommodate attachment of a generally rectangular closure which is open on the back side and bottom side and closed on the remaining four sides. Mating sliding hinge means are provided at the bottom of the closure and on the lower portion of the side wall extensions, and detent locking means are provided on the inside upper side walls of the closure and on the upper portions of the container side wall extensions.