Backlund played 32 games with the Flames last season, putting up eight goals and eight assists for 16 points along with 29 penalty minutes. He also struggled with injuries, missing four weeks with a sprained medial collateral ligament and suffering a foot fracture near the end of the season.
He was the Flames first round draft pick, 24th overall, in the 2007 NHL draft.
He has 23 goals and 39 assists in 170 career games with Calgary.
"Mikael really stepped-up last season and took advantage of the change in direction under a new coaching staff," Flames general manager Jay Feaster said in a statement. "He came into camp in very good shape and also had regained his confidence. He parlayed that into a strong season, and if it wasn't for his injury we believe he would have progressed even further in his development."