The Moroccan international, known as Moha, will officially sign the new deal in the next few days.
The club expressed their satisfaction at the 26-year-old's decision to stay and the effort he had shown in agreeing new terms at Estadio El Sadar.
Moha joins Patxi Punal, Cesar Cruchaga and Pierre Webo in agreeing long-term deals at Osasuna and the club feel the future is looking bright.
"The board is convinced that this effort (in agreeing new contracts) will consolidate the work that has been done this year and will allow fans to continue enjoying their team," read a club statement.
