Mark Hughes claims referees pick on Blackburn because they mistakenly think they are dirty.
Blackburn were fined £100,000 last season for having the Premier League's worst disciplinary record and Hughes feels many of their cards are unfair.
He feels officials believe they need to book a few of his players early on in games to establish control but should keep their cards in their pocket.
"It's acknowledged that we pick up more cards than anybody else and it's something we have to live with," said Hughes.
"We've tried everything to highlight things to our players, and we've really pleaded our case to disciplinary committees.
"But I think there's a pre-determined idea in this country about how we go about our business. In Europe we don't seem to pick up the same number of cards. There's a view that we get too many yellows - or soft yellows as we call them - because of the way we approach the game.
"Officials think they have to give out a few cards early on to calm everybody down when the game doesn't need that."
