Transport container and container arrangement

A transport container for releasable mounting on a support structure, the transport container having a lower part, an upper part, which encloses a receiving space together with the lower part and is pivotably connected to the lower part via a hinge, a closure element movable between a closed position and an open position for releasable securing of the upper part in a position that closes off the receiving space, as well as a retaining element movable between a retaining position and a release position, via which the transport container can be fixed in a coupled position wherein an underside of the lower part is arranged on the support structure, wherein the closure element and the retaining element are segments of a securing element arranged on the lower part that can be actuated independently of each other, wherein the closure element is elastically deflectable from the closed position forming a closure element base position, and has a locking tab for engagement in a locking recess of the upper part and wherein the retaining element, which is elastically deflectable from the retaining position forming a retaining element base position, has a locking element for releasable engagement in a retaining recess of the support structure in the coupled position of the transport container.