Using literature, documents and parliamentary debates in Britain, Germany, The Netherlands, Austria, and Switzerland, nine arguments for and against lowering the voting age to sixteen are distinguished and critically assessed. The assessment is based on criteria such as logical consistency and empirical validity. It is argued that most arguments can hardly be defended with these criteria. However, this does not mean that the case for lowering the voting age is weak. This would only be the case if a voting age of eighteen is considered as valuable in its own right.