Ground transportation Frankfurt to Stuttgart, Germany ?

when leaving the airport follow the sign to the train you can go to informationdesk and buy there you ticket or at a ticketmachine one way ticket starts around 61 euro some trains have a fee in train the fee is higher

Bonus answer: why do you want to go to Stuttgart Airport? If you want to leave by another plane, ok. For everything else, Stuttgart Airport is a bit out of the way, so you'd better get a ticket to Stuttgart main Station (Hauptbahnhof). In addition, there may be a bus service - depending on when you'll be going. There are a few new bus services starting in Germany around now since the German Rail has lost its regular long-distance travel privilege. One company (I got the flyer this morning in the supermarket) is starting on 19.04, and you are supposed to be able to download more information starting on 04.04. from http://www.aldi-reisen.de .