The present invention relates to a cabin mounting structure capable of firmly supporting a cabin of a freight car. In a conventional structure, when a substantial load is applied to the mounting rubber (5) at the time of collision of a freight car, There is a problem that the cabin 1 is detached from the chassis 3 and can not effectively protect the passenger because the mounting rubber 5 is detached from the mounting bracket 4, According to the present invention, an excessive load is applied to the mounting rubber 5, so that even if the fastening flange 6 is separated from the frame bracket 4, The preventive cap 7 is brought into contact with the lower end of the frame bracket 4 so that the mounting rubber 5 can be prevented from being separated from the cabin 1 and thus the cabin 1 can be prevented from being detached from the chassis 3, 1) of Doemeun able to reduce the loss of life of a passenger on board the unit is possible as well as to reduce damage to the cabin (1).
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