PURPOSE: To provide a rack body constituting a rack capable of efficiently and safely loading a product such as an H-steel on a ship or unloading it for marine transportation.

CONSTITUTION: A rack body 1 is provided with a strut arm 10 protruded to the side by a link mechanism 9 or a cylinder mechanism 12, the rack body of the adjacently stacked rack is firmly pressed to the side wall face of a hold by the strut arm 10, the stacking posture of the stacked racks is stably maintained, and the stable transportation of products is attained.