A foldable container, comprising rigid, flat surfaces that comprise a roof, a floor, two side walls and conventional doors covering each half the width of the container at a front and rear sides thereof as closing devices for defining a volume, wherein the doors can fold in conjunction with the side walls, and means configured to ensure stability and watertight, the foldable container featuring at least eight connection nodes (7 and 14) that connect the roof, floor and side walls while permitting the folding and unfolding movement of the container by turning and sliding of the side walls with the doors folded outwards from them; at least four of the connection nodes permit turning of one end of the side walls and at least the four other connection nodes permit turning and sliding of the opposite end, in both cases in conjunction with the doors opened towards the outside and secured to the external face of the side walls, at the front side of the container there are two turn nodes on two corners of the container, diagonally opposite to each other, and two turn and slide nodes being positioned on the two other corners; this layout of the connection nodes is repeated at least at the rear side of the container and can be reproduced on any intermediate section; the turn connection nodes permit pivoting of the side walls with regards to the adjacent surface, whether the floor or the roof, and consist each of a connection strip with at least two holes, which in combination with at least two conventional gudgeon pins (9 and 10) define locking points; said connection strip being configured such that in a raised position of the container the pins are placed through the holes in the strip, securing the locking points wherein turning is prevented; and such that to mobilise the folding movement of the container, the pins can be removed so that the locking points are freed and a small vertical movement of one of the side walls together with the roof can take place with regards to the adjacent surface, whether this is the floor or the other side wall, when the roof plate is raised using conventional means such as a crane until one of the pins can be inserted in one of the holes at an end locking position, thereby forming through the single locking point a connection acting as an articulation that permit relative turning of the side wall with regards to the adjacent surface, whether this is the floor or the roof, and also a space at least equal to the sum of the thickness of the side wall plus the opened door, which is necessary so that both side walls can be folded at the same time; the turn and slide connection nodes at the ends of the side walls opposite to the turn nodes comprise each a slider with at least one bearing configured to slide inside a guide (11 and 12) arranged along at least a front or rear edge, respectively, of the adjacent surface, whether this is the floor or the roof; the turn and slide connection nodes being each fitted with a means configured to overcome a dead point of movement at the start of the folding action of the container using a connection strip; this connection strip is joined at one end to the slider via conventional means that permit turning, such as a turn bolt; the turn and slide connection nodes furthermore comprises means configured to control the turn of the connection strip such as the use of squares or articulated rods; this connection strip is joined to the respective side wall via conventional means, such as a bolt that also permits turning; each turn and slide node features a movement locking mechanism; the locking of movement of each turn and slide node is achieved using a pin with three positions that permit in a first position to prevent turning and sliding, in a second position to prevent sliding and with the pin completely removed in a third position both movements are permitted to fully unlock the turn and slide node, each turn and slide connection node is configured to allow each side wall to fold with the adjacent doors folded in the open position to its outer side, by sliding the turn and slide connection node towards the inside of the container, without collision of the ends of the side walls with the floor in a node or with the roof in the diagonally opposite node; the connection nodes are arranged to permit the folding movement of the container, such that the connection nodes permit the folding lines to be located along the lines where the flat surfaces of the container meet; the connection nodes are arranged to permit the dead point at the start of the folding action to be overcome via a small previous upward movement of the roof so that folding of the container is possible via vertical movement of the container roof towards the floor; the side walls together with the doors attached to their outer sides following the folding movement until they are horizontal between the base and the roof of the container; it features conventional securing items such as threaded bolts that permit fixing the container in the folded position so that it can be handled as a single unit.