The APM Siding was a 1.125-kilometre (0.7 mi) long private railway siding in the suburb of Alphington, Melbourne, Australia that served the Australian Paper Manufacturers (now Amcor Fibre Packaging) paper mill. The siding branched from Fairfield station on the Hurstbridge line and ran south-east to the corner of Chandler Highway, Grange and Heidelberg Roads until entering the factory.