The invention relates to a container storage system (1) for transporting and/or for securing cargo in a container (3), and/or for partitioning the container (3), wherein the container (3) comprises side walls made of trapezoidal sheets having vertical creases (4), characterized in that the container storage system (1) comprises: At least two lateral supports (5a, b), which can be arranged vertically in at least two opposite creases (4) of at least two opposite side walls of the container (3). The supports (5a, b) each have at least one recess (13) that can be oriented to the inner chamber of the container (3) for receiving a cross bar (7). In the recess (13), at least one bearing element (11) for supporting the cross bar (7) is provided. At least one cross bar (7) is provided, which can be inserted in the at least two recesses (13) in the at least two supports (5a, b), respectively, and when installed, connects the two supports (5a, b) with one another, wherein the container storage system (1) can be assembled and dismantled without tools.