Bryan Robson insists it will “cost a fortune” to prise Kanu away from West Brom.
The former Arsenal star is being linked with a move to other Barclays Premiership clubs plus sides in Spain and Italy when the transfer window reopens in January.
There have been reports that the Nigeria international – made skipper by caretaker boss Frank Burrows – was unhappy with previous manager Gary Megson’s departure.
But Robson has made it clear he wants Kanu to remain and help the Baggies in the fight to stay in the top flight, starting with Sunday’s clash with his former club Middlesbrough.
Robson said: “We want Kanu to stick around. He is a quality player. Let’s just say it will cost a hell of a lot of money for anyone interested in him.”
Kanu was signed from the Gunners in the close season and has impressed with his commitment and work-rate in circumstances totally different to the trophy-laden years he experienced at Highbury.
It remains to be seen whether Robson perseveres with him as captain or hands the armband back to either Darren Purse or Darren Moore.
Robson has praised the work done by Megson and chairman Jeremy Peace in establishing the club on a sound footing.
He said: “I think the structure of this football club is nice and solid at the moment. I think Gary Megson and the chairman have done a great job.
“People have written that they were at loggerheads but, whatever has happened, they have still done a good job at getting a solid structure to this club.
“There is potential within the squad and I think it is capable of remaining in the Premiership, although a lot of hard work is required.”