CHARLIE Austin was at the double to earn Burnley their first Championship win of the season, ending Derby's 100 per cent start.
The former Swindon striker hit the woodwork with a header in a goalless first half but made up it with two crucial goals after the break.
The 22-year-old put the Clarets in front in the 50th minute, benefiting from Keith Treacy's hard work and determination to score his fourth goal in six appearances.
Treacy robbed Kevin Kilbane of possession and shrugged off the back-tracking defender's challenge to cut the ball back for Austin to finish.
Derby equalised through half-time substitute Theo Robinson, who was able to tap in John Brayford's centre.
That sparked Derby into life and Robinson deservedly equalised in the 71st minute when the lively Craig Bryson drilled the ball across and the substitute applied the finishing touch from point blank range.
At that stage, Derby looked set to go on and win it but Burnley were back in front three minutes later when Frank Fielding could not hold a swerving 25-yard shot from Ross Wallace and Austin pounced on the loose ball.
He should have scored again when Jay Rodriguez set him up.
Chris McCann almost wrapped it up with his third Pride Park goal in his last three visits but Fielding tipped over the captain's dipping volley.
Although the referee played eight minutes of stoppage time, Derby could not break through and Fielding denied Dean Marney another Burnley goal seconds before the end.