Blatter did not raise the many calls made for him to resign or Friday's election, as he opened FIFA's annual congress one day after seven top football officials were arrested as part of a US corruption inquiry.
"The next few months will not be easy for FIFA. I am sure more bad news will follow but it is necessary to begin to restore trust," Blatter told the congress.
"We cannot allow the reputation of football and FIFA to be dragged through the mud any longer. It has to stop here," he added.
"The events of yesterday have cast a long shadow over football and over this week's congress."
The football president said FIFA cannot be an "exception" to rules on corruption and added "we will cooperate with all authorities to make sure that anyone involved in wrongdoing -- from top to bottom -- will be discovered and punished."
Despite the storm, Blatter is favourite to win a fifth term in a vote at the congress on Friday. His only challenger is Prince Ali bin al Hussein of Jordan, a FIFA vice president, who has called for widespread reforms.
