To provide a pressurizing device suitable for a cargo collapse prevention apparatus used on the conveyance of cargo in a container for conveyance.

The pantograph type pressurizing device 20 includes a driving shaft 26 for connecting respective connection shafts 25, 25 to each other and arranging the connection parts closely and remotely to and from each other by the turning around an axis, wherein a rotation body R having a knurled part formed in the axial direction on the outer circumferential part thereof is integrally provided on pins P for pivoting upper part arms 22 and lower part arms 24 at side surface parts of base stands 21, 23, and at the same time, a pair of synchronized rotation bodies SR having knurled parts formed in the axial direction on the outer circumferential part thereof are respectively inserted between the rotation bodies R, R arranged right and left.