BRISBANE (AFP) - Wallaby fly-half Quade Cooper will be sidelined for up to 12 weeks after fracturing his collar-bone in training, team officials said on Friday.

The 26-year-old playmaker, who was out for 16 weeks last year with a shoulder joint injury, will have surgery on Tuesday.

The decision to have surgery was made on Friday after scans and a consultation with the Queensland Reds' surgeon.

"It's disappointing to lose Quade to such an innocuous collision during an opposed training session, but this is the nature of contact sport," Reds coach Richard Graham said.

"Fortunately, we've recruited well in the off-season and we're comfortable we have a number of options available to us."

Cooper said he was gutted to be missing the start of the season.

"But injury setbacks are something you learn to deal with and this isn't the first time I've had to come back from something like this," he said.

"There's a lot of excitement among the (Reds) group for the season, so it's good motivation for me to give myself every chance of getting back on the field as soon as possible."