Comedian Jan Boehmermann read out a poem on a satirical show in March viewed as insulting to Erdogan, prompting Erdogan to file a complaint with prosecutors.
The German government had given prosecutors the green light to pursue the case against Boehmermann - a move which brought Chancellor Angela Merkel strong criticism. But prosecutors on Tuesday said they had not found sufficient evidence to support the filing of charges.
Comedian Jan Boehmermann
German prosecutors said on Tuesday that they had dropped an investigation into a German comedian who was accused of offending a foreign leader after reciting an obscene poem about Turkish President Tayyip Erdogan on national television.