This submitted thesis deals with a legal regulation of the prohibition of a competition in labour relations. The thesis is composed of six coherent chapters, the Fourth Chapter addressing the issue of current legal regulation applicable to prohibition of the competition in labour relations in the Czech Republic is the core part of the thesis. The purpose of the thesis is to analyse and to provide the comprehensive overview of the prohibition of the competition during the labour relation as well as after its termination (i.e. the non-competition clause). The thesis also briefly describes the legal concept of labour relations; the attention is also paid to the historical survey of the prohibition of the competition in labour relations. Furthe...