Presented paper suggests an instrumental approach to soft security and aims to reveal capacity of soft security instruments in terms of contribution to both security and sustainable development in the region which is addressed by Eastern Dimension of European Neighbourhood Policy and which includes Eastern Partnership (EaP) countries: Armenia, Azerbaijan, Belarus, Georgia, Moldova and Ukraine. Russian Federation (which is neither part of EaP nor among 16 EU partners addressed by the European Neighbourhood Policy) is also included in the overview as an important factor of influence in respect of regional security and relations between EaP states and EU. Referring to the main ideas of researchers and policy makers using different approaches to soft security as a phenomenon, the authors of the paper define soft security instruments as purposely organised social practices which rely mainly on sharing, congruence and development of values and competences of initiators and participants of security governance. Focus on the effectiveness of sharing, congruence and development of values and competences of initiators and participants of the EU policies and related joint projects as well as relevant combinations of soft instruments with economic and normative hard means is seen as a possibility to gradually increase level of regional security and transfer elements leading to sustainable development in this region.