The Dutch defender's previous deal had been due to expire this summer and as a result his services had been linked with a host of European teams.
However, the speculation was ended this afternoon as the 23-year-old agreed to extend his stay with the Amsterdam-based outfit.
"We have an agreement and everyone is very satisfied. Daley will play the next three years with Ajax," director of football Marc Overmars told the club's official webiste. "All doubts disappeared. Daley is a full international and at Ajax we hope this will continue."
Blind has made 31 appearances for Ajax this season.