ABSTRACT This diploma thesis deals with the liberalisation of the electricity market and with the consequences it has for the consumers. An opening of the electricity market should have encouraged competition in the field of this state owned monopoly at the profit of the consumers. To secure this, however, they need to be granted sufficient rights. First, the thesis will provide a short overview of the stages of the liberalisation of the electricity market according to the European Community Law. Directive 2003/54/EC plays an important role for consumer rights in particular. Second, it will briefly outline the Elektrizitätswirtschafts- und -organisationsgesetz (ElWOG), as well as the allocation of rights and duties in the field of electricity. Afterwards, it offers a description of the regulatory authorities involved and an analysis of network access- and power supply contracts. The main focus of this paper lies on the power supply contract, as well as on aspects relevant for consumer rights. Therefore, consumer rights established during or before the conclusion of a contract will be discussed on the one hand, as well as the rights consumers enjoy for the duration of the contract on the other hand. One central focus is on the contractual conditions, and in particular on the control of regulative authorities and civil courts over these contractual conditions. Rights of cancellation and rights of withdrawal also play an important role in the field of consumer rights.