Former Foreign Minister of South Korea was already leading the UNITED NATIONS since 2007.
Ban Gets a lot of praise for promoting issues such as climate change and the rights of women, but his quiet condemnation.
The diplomat said, in the absence of a rival for the position, the Ban could instantly win before the end of this month.
Ban said he had sent a letter to all States members of the UNITED NATIONS to "offer, with humble myself to be considered for a second term as Secretary-General of the United Nations."
The current term of office he will be out later this year.
Analysts said, if he does not have a rival, the Security Council could give approval and the General Assembly will hold a vote regarding the position before the end of June.
Office Ban defended his approach in international diplomacy, and said he worked behind the scenes with diplomacy quietly but also do public pressure to push the issue of human rights issues.