Before upgrading to OS X Lion, it is wise to check if your printer is supported by the new operating system. Printers that are supported by Snow Leopard should run the same under Lion. Apple has published a support article that lists the supported printers under OS X.
Apple supplies third party printer drivers via OS X Lion’s System Update. Do not install printer drivers from CDs supplied as part of the printer as it is probably not updated for OS X Lion. Before you connect your printer to a Mac, run the System Update to install any available system updates. Connect your printer to the Mac, and OS X Lion will automatically download the necessary printer drivers.