To easily attach a net to a rack and prevent fixing means or the net from protruding outside supports in a net attaching structure in an assemblable rack.

In the net attaching structure in the assemblable rack that the net 8 is attached to the side surfaces or the front and back surfaces of the assemblable rack having the supports 2 provided upright at intervals in the vertical and horizontal directions, a pair of supports 2 adjacent to each other in the front and back directions or in the right and left directions have vertical slits 9 on their opposed surfaces, base parts 10 engaging with the fixing means 7 so as to move them vertically on the slits 9 and holding parts 11 connected to the base parts 10 and engaging with the outer frames 8a of the net 8.