Darren Moore grabbed a last-gasp equaliser as high-flying Derby denied QPR a first away win since November. Martin Rowlands put the Londoners ahead, nodding the ball home after Paul Furlong's shot hit the post.
But the Rams had the better of the chances with David Jones and Steve Howard both going close.
And the Rams continued to pile on the pressure in the second half and eventually got their reward when Moore headed home with three minutes left.
Derby manager Billy Davies:
"We knew what to expect but it was a lesson for the younger players.
"They're learning that sometimes you can't get the ball down and play against these sides, that sometimes it needs to go up field.
"It would have been nice to get three points but it's easier said than done."
QPR manager John Gregory:
"The disallowed goal was atrocious. An awful decision by the linesman. Marc Nygaard was in an offside position but Furlong wasn't.
"The referee admitted to Furlong the linesman had called the wrong player.
"There were a few strange decisions. I thought the referee was very influenced by the home crowd."
Derby: Bywater, Edworthy, Leacock, Moore, McEveley, Teale (Fagan 66), Oakley, Jones (Peschisolido 77), Barnes, Howard, Lupoli.
Subs Not Used: Grant, Seth Johnson, Mears.
Booked: Moore, Howard.
Goals: Moore 87.
QPR: Royce, Mancienne, Stewart, Cullip, Bignot, Rowlands (Ainsworth 28), Lomas (Smith 90), Idiakez, Cook, Nygaard, Furlong (Ray Jones 84).
Subs Not Used: Cole, Kanyuka.
Booked: Furlong, Ainsworth, Idiakez, Bignot, Cook.
Goals: Rowlands 14.
Att: 27,567.
Ref: S Tanner (Somerset).