To prevent a locking part of a beam material 6 from easily coming off a support 3 of a rack.

This rack is so formed that a locking plate 15 at the end of the beam material 6 is provided with locking claws detachably fitted to locking holes 12 on the side of the support 3 and engaged with the lower inside of the locking holes 12 by the downward movement of the locking plate 15, and a connecting crosspiece material 8 is provided between the beam material 6 and a rear-side beam material via locking holes 18 on the beam material side and locking pieces 8a of the side of the crosspiece material 8 side downward engaged with the locking hole. The locking plate 15 has the plurality of upper/lower locking claws 20a-20d including the lowermost locking claw 20d positioned lower than the crosspiece material 8 as the locking claws, the other locking claws 20a-20c excluding the lowermost locking claw 20d out of the plurality of upper/lower locking claws 20a-20d, are formed into the same length simultaneously detachably fitted to the respective locking holes 12 on the side of the support 3, and the lowermost locking claw 20d alone is formed longer than the length of the other locking claws 20a-20c.