The purpose of my thesis is to analyse tax legislation for sportsmen. The reason for my research is that sport in our era is not only leisure time activity, but also can be very significant source of income for athletes, sport institutions and other subjects, that must pay taxes. I have also very close relationship to sport, and sports enviroment, so it is consequent, that I choose to connect sport, and subject of my study, wich is law of course. The thesis is composed of seven chapters, each of them dealing with different aspects of tax legislation and sports enviroment. Chapter One is introductory and defines basic terminology used in the thesis, such as sportsman, sport, sports associations. It also contains subchapters wich deals with history, legal form of activity of athletes (point of view on professional athletes in individual sports and collective sports), and the comparison of this problematics with other european countries, and European Union. Chapter Two analyzes critical judgment of czech Supreme administration law court about legal form of activity of athletes. It concludes with suggestion, that professional athletes in collective sports could be besides employees also self-employed persons. Chapter Three is subdivided into four parts and provides an outline of taxation of athletes. Part one...