This thesis is based upon the analysis of the term infrastructure gap, which is hardly ever used in Slovenia even though it represents one of the key suppositions for understanding how the construction services operates. The thesis describes different kinds of infrastructure and explains the meaning of what each type of infrastructure represents in Slovenia. It also discusses the field of unsuitable development of different types of infrastructure based on target development, also known as infrastructure gap. It introduces different definitions and evaluations of the infrastructure gap, which were introduced by different international institutions, and also different methodological approaches for determining it. For Slovenia, the overview of investing in infrastructure is presented with the help of statistical data. Due to the limited financial resources the public sector has trouble providing funds for the sufficient investment in infrastructure. The adequate sorting of infrastructure projects, based on understanding of the current situation, is listed as one of the possible solutions. The thesis also includes the overview of Slovene documentation in the field of defining strategies, operational plans for infrastructure project and assessment of their readiness, which is the best approximation to the identification of the infrastructure gap in Slovenia. I concluded my work with a quick assessment of Slovenia based on the strategic infrastructure planner framework, which is introduced by The World Economic Forum. Areas of infrastructure and support system, which are being recognized in the assessment, achieve the standards of comparable countries and regions to a large extent whereas Slovenia still deviates considerably from them.