The Libyan leader has not been seen since rebel troops entered the capital Tripoli a week ago.
Mustafa Abdel Jalil, who chairs the rebel National Transition Council (NTC), however, said it was important that NATO and its allies continue helping the country.
"I call for continued protection from NATO and its allies from this tyrant (Gaddafi). He is still a threat, not just for Libyans but for the entire world," Jalil was quoted as saying by Sky News Monday.
Jalil was speaking from Doha, Qatar, as he met other leaders to discuss the future of the country.
The rebels said they have no information about where Gaddafi was, but have offered a reward of $1.3 million and amnesty from prosecution to anyone who kills or captures him.
US Admiral Samuel Locklear, who is heading the NATO operations, said he believed the Gaddafi regime was "near collapse".
NATO was "committed to seeing the operation through to its conclusion", he said.
NATO has conducted 20,751 sorties in Libya, including 7,806 strikes since the conflict began March 31. It has also carried out 864 "humanitarian assistance movements", which includes efforts on the ground, by air and by sea, official figures show.
