Thesis title: Taxation of income from sports activities The objective of this thesis is to analyze the current state of legal regulation of the taxation of the sportsman income, including the decision- making activity of the courts related to this issue and on the basis of the findings to conclude whether current practice corresponds to the interpretation of legislation. The thesis is structured into three main chapters. The first chapter is devoted to defining concepts that are crucial to this work, the term "sport" and "sportsmen". It deals with the regulation of sport in the international law, European law and Czech law. Then the term sportsmen, including his status in Czech law and European law, are analyzed in a similar way. The second chapter focuses on the taxation of income from sports activities and is divided into two main parts. The first part is devoted to the taxation of income from sports activities of professional sportsmen performing collective sports, the second part is dedicated to sportsmen performing individual sports. The last chapter stands on the findings from the previous parts of the thesis and deals with the taxation of income from sports activities de lege ferenda.