"Manmohan Singh himself does not want to be the Prime Minister next time...I support Rahul Gandhi to become the Prime Minister. I am saying it openly and formally," Gogoi told reporters here.
He, however, maintained that it was his personal choice and he had informed Congress president Sonia Gandhi about his preference.
"She kept quiet after listening to my suggestion," the Chief Minister said.
The Prime Minister had recently said he will be "very happy" to work under the leadership of Rahul Gandhi and described Rahul as an "ideal choice" for the top post after the Lok Sabha polls.
Gogoi also said he would love to work with Rahul as he had done earlier with Indira Gandhi and Rajiv Gandhi.
"I will not leave this family...Rahul's commitment is very high," he said.
Asked if the party high command has already taken a decision on Singh's future or Rahul's projection as the Congress prime ministerial candidate, Gogoi said "No, it has not taken (any) yet and I do not know when they will take it. I am only saying about my choice for Rahul."
On whether the 2014 election will be a fight between Rahul and Narendra Modi, he said, "Fight is not between individuals, it will be between Congress and BJP. The fight will take place between the leaderships."