A foldable container enables the entire height of a folded state thereof to be one fifth of the entire height of the state of being folded, such that the height of an international standard container can be satisfied even though empty containers are stacked in five stages. To this end, the hexagonal foldable container can include an upper panel part and a lower panel part respectively forming the upper surface and lower surface thereof; a left panel part and a right panel part respectively forming the left surface and right surface thereof, and respectively folded; a front panel part and a rear panel part respectively forming the front surface and rear surface thereof; and a fixing bar provided at the outer surface of the rear panel part.