Abstract: A container is an ISO standard-compliant container that has at least: a freight chamber in which freight is loaded; and side doors that are provided on the sides of the freight chamber in the longitudinal direction and are obtained from pairs of doors that open to the left and right from near the center of the longitudinal direction of the freight chamber. Each of the pairs of doors that configure the side doors are obtained from: sub-doors near the center; and sub-doors that are mounted to rotate freely on the sides of the freight chamber via hinges and support the sub-doors to rotate freely via hinges. The longitudinal dimension of the sub-doors is shorter than the longitudinal dimension of the sub-doors.