The principle of equality in law is one of the dominant principle is an important step inmodernization. Today is a universal principle of equality of rights, law and justice is one of the values that make up the core of the concept. Philosophers discussed at the beginning of the concepts of equality, such as a very traditional idea formed the basis of the focus was on today's modern states. The principle of equality is important in labour law. Regulation of working life and business relationship safe weak in terms of protecting the rights of the worker's employer no longer comes up debt equal treatment. In particular, the underlying process of harmonization with the European Union, which is one of the values of equality, article 10 of the Constitutional guaranteed by Article and the principle of equal treatment are in the Labor Act No. 4857. In our study, examining all aspects of labour law, the principle of equality and equal treatment principle of equality as a priority to work and the concepts of debt will be examined, the employer should have equal treatment conditions for the existence ofdebt will be dealt with. The next section hukukumuzda existing debt of the employer'sequal treatment and prohibition of discrimination in this context, a privately held, and finally examined in violation of the principle of compensation for the discrimination will be discussed.