To provide a connection means which reduces the packing volume of a double-rod side frame type rack.

This linear connection means for the double-rod side frame for the rack has a vertical groove, vertically penetrating through the connection means and used for inserting the double rod of the double-rod side frame from the upper end and the lower end, an opening is provided on a side of the connection means, upper/lower two horizontal eccentric rotary shafts provided in the opening part, single handles connected to the two eccentric rotary shafts respectively, the eccentric parts of the eccentric rotary shafts pressurizing the double rod in the groove, and the double rods of the upper/lower double-rod side frames connected to each other in linear form.