We present a new sample of galaxy groups identified in the Sloan Digital Sky Survey Data Release 3 .
Following previous works we use the well tested friend-of-friend algorithm developed by Huchra & Geller which take into account the number density variation due to the apparent magnitude limit of the galaxy catalog .
To improve the identification we implement a procedure to avoid the artificial merging of small systems in high density regions and then apply an iterative method to recompute the group centers position .
As a result we obtain a new catalog with 10864 galaxy groups with at least four members .
The final group sample has a mean redshift of 0.1 and a median velocity dispersion of 230 km s ^ { -1 } .