Abstract: A collapsible transport and storage container comprising a base member (2) and inwards foldable side walls (1) which are moveably attached to the base member (2) via hinges. The container is provided with upper hinge members (3′) at the side walls (1) and lower hinge members (3″) at the base member (2). The lower hinge members (3″) are provided with assembly grooves (36). The assembly grooves (36) are applied in an angle (A) from the base surface of the base member (2). The side walls (1) are provided with one or more locking profiles (37) at their respective lower ends (1′) which are intended to cooperate with the assembly grooves (36) during assembly and disassembly. The locking profiles (37) are provided with a locking edge (37′) which runs against a wall member (33) during the main part of the folding and unfolding motion of the side wall (1). The invention also relates to a method to assemble such a container.