SME sector has an important role in national economies, contributing significantly by creating added value and increasing labor employment. This paper aims to highlight the main features of the SME sector in Romania; it`s recorded positive developments, but also the effects of the European integration. The recorded progress shows that the SME sector development in Romania is part of the trends in the European Union where this sector has a significant role in developing Member States. However, based on the surveys of representative institutions at national and international level, this paper aims to highlight also the main difficulties faced by SMEs, the effects of the crisis on their activity and measures adopted to support this sector.In the context of the current crisis, a significant part of the SME sector in Romania is severely affected. Thus, in this paper there are shown the effects of the current crisis on the SME sector and the main problems faced by them. The central role of the SME sector in national economies has led the national authorities, and some European and international institutions to adopt anti-crisis measures, to support this sector. However, in order to restore normal functioning of the SME sector including the normal functioning of the national economy it is vital not only the adoption of measures but choosing the most appropriate ones taking into account each country particularities, tracing how they are implemented and strengthening the collaboration between authorities and institutions that work togheter to support the SME sector.