The 26-year-old No.9 joined Dai Young’s squad from Gloucester ahead of the 2015/16 campaign and has since made 81 appearances.
During this time he has claimed 27 tries, ten of which have arrived during a prolific 2017/18 campaign which began with a four-timer against Sale Sharks.
Since joining Wasps, former England under 20 Robson has started a Premiership semi-final and final and also been part of the squad which reached a European Cup quarter-final then semi-final in consecutive seasons.
Director of rugby Dai Young said:
“Dan has been outstanding for us this season. His consistency has been really impressive, and when he is really on song he has the ability to frighten defenders.
“He has worked hard at his game over the last three years, and as a result is now one of the best scrum halves in Europe.
“At 26, there is still plenty more to come from Dan, who like a number of our other English-qualified players should be a big part of our side for the next half-a-dozen years at least.
“I am obviously biased, but if Dan continues to deliver the same level of performance for us, it can surely only be a matter of time before his England chance comes.”
Dan Robson said:
“I am happy to re-sign at Wasps where I have really enjoyed my first three seasons.
“It’s very exciting to be part of what is shaping up to be a really good spell for the club.
“Like every player I very much want to be part of a squad that wins something and I believe I have every chance of doing that at Wasps.
“Dai, the coaches and the staff have all been fantastic to me and I’m really looking forward to working with them some more in the coming years.”