The configuration of the Meso-Neoproterozoic Rodinia supercontinent and the position of Siberia in Rodinia remain most debatable (Pavlov et al., 2002; Meert, Torsvik, 2003; Pesonen et al., 2003; Pisarevsky, Natapov, 2003). It was supported the formation of the Rodinia supercontinent as a result of Grenvillian collisional events (late Meso- early Neoproterozoic) and its break-up was connected with Neoproterozoic rifting. The analysis of geological structure of Meso-Neoproterozoic passive and active continental margins of Siberia and their evolution together with paleomagnetic studies can provide important constraints on the existence of Siberia in the Rodinia supercontinent and its position among other continents. This analysis shows that Siberia was completely or almost completely surrounded by ocean basins in late Meso- to early Neoproterozoic. There is much evidence that the eastern, western, and southern margins of Siberia were passive continental margins at this time. The transformation of southern and western passive margins into active ones took place in the Early Neoproterozoic - 900-800 Ma and 800-750 Ma, respectively. The eastern margin remained a passive continental margin also in Paleozoic. We suppose that the northern margin was passive in late Meso- to early Neoproterozoic because the formation of island arcs, which were obducted later onto Siberia, began 800-750 Ma ago. Thus, the features of structure and evolution of Siberia margins give us some constraints for the determination of its position among other continents. The most Rodinia reconstructions placed Siberia adjacent to Laurentia. A lot of Meso-Neoproterozoic paleomagnetic poles have been obtained for Laurentia. Whereas, a lack of reliable palaeomagnetic poles for Siberia remains one of the major problems. The reliable palaeomagnetic poles were obtained for the late Mesoproterozoic of Siberia only (Pavlov et al., 2002). The Neoproterozoic interval of the Siberian APW path is synthetic result of spline-interpolation and did not confirm by real data. Moreover, the choice of polarity of the Mezo-Neoprotherozoic paleomagnetic poles is a separate unsolved problem too. The paper shows new paleomag data for the north-west and west margins of Siberia, and discusses the Meso-Neoproterozoic Siberian APWP and Siberia-Laurentia orientation as well.