"It's time to change things," the 350 journalists from daily newspapers, magazines, monthly publications, radio and television said in their petition, seen by news agency AFP on Monday, in the face of a media world they say is run predominantly by men.
"We demand that at least 30 percent of editorial management posts are held by women in the next five years," they said.
They argued that currently just two percent of chief editors at the 360 daily and weekly German newspapers are women, while three out of 13 heads of public TV and radio stations are women.
In October, the 30 major German companies trading on the German blue-chip DAX unveiled a plan to bring more women into management, but stopped short of making quotas compulsory.
Deutsche Telekom became the first DAX company to set a binding 30-percent management quota.