Nowadays, the development of the Web 2.0 shows major impacts in the field of economics. Significant in this context are also the effects of these measures on business ethics. For this reason, this thesis examines the influence of the Web 2.0 on special economic actors in context of the business ethics. The first part of this thesis focuses on a theoretical description of Web 2.0 and the business and information ethics. The second part deals specifically with the impacts on consumers, companies and employees. For the consumer-section, the biggest point of discussion is given by the usage of personal user data through companies. As the companies use the user data for generating individual, personalised advertising based on the consumers interests, it raises the question of the legitimation of this data usage on the consumer-side, especially on how this process is compatible with the right to privacy. The major change for the company-section is that the Web 2.0 gives some kind of force to NGOs and consumers, which leads to more transparent companies. For this reason, the online-reputation and the associated CSR-communication becomes more important. For the employee-section there are two observed changes. On the one hand, there is the possibility of companies to check their applicants or existing staff in the Social Media. On the other hand, an increasing trend by companies, which includes the outsourcing of more and more jobs to freelancer through online portals, is present.