I would suggest checking your Printer Driver.Please use the Printer Driver that comes with Windows - or at least a compatible one - or go to the Printer Manufacturers website to download the latest version.
Printer Drivers can sometimes have a bug that gives an unusual value for their printable paper areas.
If this doesn't fix it, can you confirm that the Print Preview shows exactly the same problem when printed?
What Printer Make & Model do you have? and where did you get the driver?