Portable back-container with a plastic concave container against the back (1), a connecting carrying frame (2) of metal to which the carrying straps (5) are attached. The problem is to adapt the carrying frame (2) to the plastic container (1) in such a way, that it gives stability to the container at the same time as it prevents pressure against the back and that the container's concave side is pressed out under the influence of an inner pressure. To solve the problem there are on the container's (1) inward bulging side (11) grooves in which the carrying frame (2) or a part (8, 8') of it is lowered into.IMAGE
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