The 2012 Moselle Open was a tennis tournament played on indoor hard courts. It was the 15th edition of the Moselle Open, and part of the ATP World Tour 250 series of the 2012 ATP World Tour. It was held at the Parc des Expositions de Metz Métropole in Metz, France, from 17 to 23 September 2012.

The following players received wild cards into the singles main draw:

The following players received entry from the singles qualifying draw:

The following players received entry as lucky losers:

The following pairs received wildcards into the doubles main draw:

Jo-Wilfried Tsonga def. Andreas Seppi, 6–1, 6–2

Nicolas Mahut / Édouard Roger-Vasselin def. Johan Brunström / Frederik Nielsen, 7–6(3), 6–4