Hart has faced an increasing level of criticism, following his woeful error during England’s humiliating defeat to Iceland during Euro 2016.
There have been many calls for Jack Butland to replace Hart as England’s number one.
But Bilic insists that Hart is a phenomenal goalkeeper, and gets criticised just because he has become a scapegoat.
“Has he become an easy target? Yes. The guy is brilliant,” Bilic said.
“I’m not just talking about goalkeeping now. The guy never slaughters anyone in the job.
“He is taking the bullets, he is there every single time, whether he is at City or Torino [where he spent last season on loan] or West Ham. He is a great professional and a top pro.”
Hart’s performances for West Ham since he signed last summer have not been greeted with unanimous praise.
The 30-year-old has actually been criticised by some sections of the West Ham crowd, who feel he has been shaky.
Hart did keep a clean sheet in his last appearance for England over the international break, as he helped the Three Lions to a 1-0 victory over Slovenia.
West Ham are next in action this weekend, when they take on Burnley at Turf Moor.