Labour market is facing unconstrained global economic trends and transformation of work. To gain an added value the contemporary company business policy is based on continuous competition causing restructuring of labour force, erosion of social standards and reduction of workers protection which consequently destabilizes the economy and society in general. In order to generate profits, enterprises are increasingly manipulating workers through creative and time-limited non-standard forms of employment to avoid labour, social and fiscal responsibility. Following global and European trends, Croatia seeks to respond to the challenges of low participation in the labour market and high unemployment rates trough application of non-standard work. Adapting to labour market changes using this type of deregulated instruments resulted with high incidence of precariousness in employment in all its various manifestations. Nevertheless, the absence of clear Croatian labour law provisions often leads to the categorization of non-standard forms of employment under various positive labour law grounds as a method that creates a niche for abuse of atypical forms of employment. In this regard, due to the large number of workers who perform work on various non-standard contractual bases and the complexity of creating a representative sample, the research is limited to a narrower target group of workers. In the context of the expansion of non-standard work and its impact on the appearance and status of a new, precarious worker, the proposed dissertation tries to analyze the features of the precariousness of "classic" non-standard forms of work - fixed-term work contracts, temporary agency work, student work and to a lesser extent part of part-time work - in Croatian law and practice, and to propose de lege ferenda solutions by which it could be removed or mitigated. In the context of the expansion of non-standard employment and the precarious position of new worker performing work in low-quality jobs, the proposed dissertation seeks to quantitatively analyse respectively map the magnitude of usage of so-called „classic“ atypical forms of work and identify innovative forms of employment present in Croatian labour market using statistic and comparative method. The research de lege ferenda examines the legal solutions of selected EU member states that could be used as guideline in the process of redefining the Croatian regulatory framework when amending the comprehensive model of protection for workers on the labour market. Furthermore, in some extent proposed dissertation strives to raise the awareness about importance of trade unions which in the world of increasing labour market flexibility is losing its meaning. When engage in an inclusive strategy, unions have the opportunity to provide adequate legal protection for precarious workers who perform profitable work within the standard employment relationship and atypical employment arrangements, given that they are at risk of precariousness as an inherent characteristic of all forms of employment.