The Madrid side climb up the Primera Liga with their second away win of the season at Osasuna.
Diego Godin's goal continues Atletico's revival
Diego Godin scored the only goal of the game five minutes before half-time to give Los Rojiblancos only a second away win of the season - and move them up to seventh in the Primera Liga table.
Radamel Falcao had the game's first chance in the 17th minute, bringing a good save out of Osasuna goalkeeper Andres Fernandez with a right foot shot from 12 yards.
Dejan Lekic shot wide at the other end four minutes later, before Osasuna team-mate Roland Lamah tried his luck two minutes later but saw Thibaut Courtois save easily.
Javad Nekounam was off target for the home side in the 35th minute - and six minutes later the visitors made the vital breakthrough when Godin blasted in from close range.
Adrian Lopez brought a save out of Fernandez just 90 seconds into the second half, then made the home keeper work harder five minutes later from 12 yards.
Tiago tried his luck from 25 yards in the 52nd minute but saw his shot go wide, before Falcao maintained the pressure on the home goal with a close range effort which also went wide.
Nekounam was similarly off target with a 65th minute effort and the theme continued at the other end eight minutes later when Lopez's right foot effort from 25 yards also failed to test the goalkeeper.
The home side, beaten in just one of their previous 10 home games, threatened an equaliser in the closing stages.
Lekic saw a close range header saved by Courtois 15 minutes from time, then four minutes later the Atletico goalkeeper denied the same player after he had got on the end of David Timor's corner.
After Raul Garcia had seen a header saved by Courtois, the home side's final chance of taking something from the game came and went in the second minute of injury time when Sergio's header missed the target.
After more than four minutes of stoppages, the final whistle signalled a third successive victory - without conceding a goal - for Atletico.