Fabian Giefer (German pronunciation: ; born 17 May 1990) is a German professional footballer who plays as a goalkeeper for FC Augsburg in the Bundesliga.
Born in Adenau, Rhineland-Palatinate, Giefer began his football career at 1. FC Oberahr as his first youth club. He then move to TuRa Lommersdorf before moving to Bayer Leverkusen, where he started his professional career. He would soon promoted to Bayer Leverkusen II. Griefer played his first Bayer Leverkusen II match in the opening game of the season, in a 2–2 draw against Verl. At Bayer Leverkusen II, Giefer spent the season competing the first choice goalkeeper role with Benedikt Fernandez and Erik Domaschke, which saw him made ten appearance.
Giefer was promoted to the Bayer Leverkusen first team ahead of the 2009–10 season. Having signed his first professional contract with the club he was expected to fight over a first choice goalkeeper role with René Adler. Following Adler's absence, he made his Bundesliga debut on 6 November 2009 against Eintracht Frankfurt, in which he kept a clean sheet in a 4–0 win. While Adler managed to regain his first choice goalkeeper role soon after, he went on to make two appearances for the side in the 2009–10 season against Hannover 96 and Borussia Mönchengladbach.