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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.
Bin Hammam revealed yesterday he would be interested in cutting
a deal with Platini to oust Blatter.
Blatter told the Congress that Fifa would now have "zero
tolerance" for corruption - two Fifa executive committee members
were banned last year after asking for money in return for votes
for the 2018 and 2022 World Cup hosting rights.
He said: "We can see cases of corruption that really hurt the
whole football family and for this reason at the Fifa Congress we
will show we will have zero tolerance.
"We will have zero tolerance on the pitch, more education, more
respect towards the referees. There will be zero tolerance beyond
the pitch - we have the instruments for that, the disciplinary
committee, the ethics committee, and it's time to act.
"We will do whatever is necessary."
Blatter also praised Platini's plan of having two extra
assistant referees behind each goalline, which is now being
trialled in European club competition and international
football.
He added: "I'm happy to commend Uefa for its revolutionary view
of refereeing and having five or even six officials on or near the
pitch, not just three or four - this is a compliment."