To provide a packaging body for packaging many duct heat insulating materials and its production method for lowering the numbers of lifts by an elevator or of transportation by a transporting vehicle etc. from a factory to a working site, not requiring much storage space at a working site and not generating the cut ends or leftovers of the materials during work.

In structuring this packaging body 100 for packaging many duct heat insulating materials, the duct heat insulating materials 1 used for covering a duct and comprising the laminated body of a soft mat-like heat insulating material and a sheet-like top coating material is folded in 2-5, stacked in a large number, compressed and is stored to be vacuum packaged in a bag shaped body 6.