The director general of Al Jazeera broadcaster announced Tuesday he would step down after eight years as the network's top executive, dpa reported.
"I have decided to move on," Wadah Khanfar said in a farewell note, adding that the goal of establishing Al-Jazeera as a global media leader had been met.
Khanfar did not give a reason for his resignation, which comes a few days after leaked US diplomatic cables said that the US government had had a say in the content appearing on the Al Jazeera's website.
The network has been playing an important role in covering the uprisings in the Arab world.
"We remained steadfast in our editorial policy - in fact, each attempt to silence us further emboldened us and increased our resolve," he said.
The new director general is believed to be Sheikh Ahmed bin Jassim Al Thani, a member of the country's royal family.
Al-Jazeera began its Arabic news broadcast in 1996, to become a leading regional media outlet, at a time when state televisions were the prevalent source of information in the Arab world.