Actuality of research the particularities of labour force market and its interrelation with processes taking place in economy, demography and social sphere increases. Globalization of the world economy and growing integration processes in Europe, population decline, ageing and migration of working-age population, as well as transition of the Republic of Moldova to market economy have aggravated existing problems and added new ones in the context of labour market competitiveness, both at internal and external levels. The process of transformation and adaptation to changes both in the economy and in its derivative segment or labour market are lengthy and have specific particularities and difficulties. This paper presents the research results of the impact of the principal factors the demographic and socio-economic nature that influence the sustainability of labour market development and its competitiveness. In particular, it evaluates the impact of demographic factors on the labour force reproduction and the increase in the demographic dependency on the working age population, as well as the impact of factors of socio-economic nature, motivation for labour activity, increase in economic activity and employment. Low wages and an imperfect legislative and normative framework in labour relations created the preconditions for search and developing illegal (informal) employment, providing additional opportunities of job placement with flexible working regime and receive higher incomes. The research is based on statistical data and calculated secondary indicators using the population of usual residence. The suggestions for improving the situation on labour market and increasing its competitiveness were elaborated on the basis of the obtained results.