The aim of this issue is to study how Swedish public libraries deal with the principles of freedom of speech and freedom of information in connection with public use of the Internet. The authors intention has been to find out whether the public use of the Internet has caused ethical problems for library workers and how the libraries solve situations when they consider their principles violated by library users. The authors study the debate on the issue in a couple of Swedish library magazines published during the late 1990s and they also give a few examples from the USA during the same period. They study the ethical principles and directives for schools published by the Swedish Board of Education as they claim that many of the public library users are students who bring along their ethical conceptions and thereby affect the ethical climate of the libraries. In their study the authors refer to ethical rules given to librarians by their trade union DIK and to the conclusions drawn from the hearing Good Ethics on the Net held by the Swedish IT Commission in 1998. They also refer to the European Commissions Action Plan on promoting safer use of the Internet. The authors wish for a general code of ethics concerning the use of the Internet at Swedish public libraries and suggest that the libraries consider the work that is being done by the European Commission to promote safer use of the Internet.