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We have used the Vimos VLT Deep Survey in combination with otherspectroscopic, photometric and X-ray surveys from literature to detect severalgalaxy structures in the Chandra Deep Field South (CDFS). Both afriend-of-friend based algorithm applied to the spectroscopic redshift catalogand an adaptative kernel galaxy density and colour maps correlated withphotometric redshift estimates have been used. We mainly detect a chain-likestructure at z=0.66 and two massive groups at z=0.735 and 1.098 showing signsof ongoing collapse. We also detect two galaxy walls at z=0.66 and at z=0.735(extremely compact in redshift space). The first one contains the chain-likestructure and the last one contains in its center one of the two massivegroups. Finally, other galaxy structures that are probably loose low massgroups are detected. We compare the group galaxy population with simulations inorder to assess the richness of these structures and we study their galaxymorphological contents. The higher redshift structures appear to probably havelower velocity dispersion than the nearby ones. The number of moderatly massivestructures we detect is consistent with what is expected for an LCDM model, buta larger sample is required to put significant cosmological constraints.

The Vimos VLT deep survey: compact structures in the CDFS