To provide a vertical apparatus for volume reduction and solidification of waste which can enhance volume reduction and solidification capabilities by uniformly pressurizing the waste to be compacted to a volume reduction platen surface without the occurrence of bending and twisting at a screw shaft for volume reduction and solidification of the waste, facilitates maintenance and can be made lighter in weight and smaller in size.

This vertical apparatus for volume reduction and solidification of waste provided with the screw shaft for compressing the waste within an apparatus body having a hopper, a compression chamber and the volume reduction platen is formed by constituting the screw shaft of a spindle support, a spindle and an outer cylinder provided with a rotary blade and by holding the screw shaft self-sustainably independently from the apparatus body within the apparatus.