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Blatter is seeking a fourth term as Fifa president and is being challenged by Asian confederation chief Mohamed Bin Hammam.
The 75 year-old told Uefa's Congress in Paris that if he wins he will definitely stand down in 2015.
Blatter said: "You know very well that I am a candidate for the next four years as Fifa president but these will be the last four years for which I stand as a candidate.
"Together we have the task of bringing together the adventure we have started. We want to ensure a better future for our youth."
Blatter's announcement appears to be a direct appeal to the 53 European countries to support him and then he will make way for Uefa president Michel Platini in 2015.