The text called „The Principles of Medical ethics – 1st part“ is the beginning „enter“ to problem of medical ethics principles. The principles have their irreplaceable place in medical ethics. It isn´t possible to talk about principles without a connection with norms (rules), institutions and limits. A concept norm started to use for signing what is morally right until 19th century. Norms work in the society as regulators of peoples´ actions containing orders, prohibitions or permissions. Moral norms will never stop mens´ exceeding. Of course, there can be given reasons and justification with re-calling to the values like (freedom, life, health…) or there can be general principles (dignity, justice…). Only reasonable and justified moral norms can establish another expectations in human subjects. The text is oriented on principles of medical ethics. The doctor naturally has to know four basic principles of medical ethics. He has to know theoretical and practical level of these principals. Holding norms and principles are necessary part of doctor´s practice. There are beautiful examples of materialization of principles of medical ethics - fifteen principles given in „The European Charter of Medical Ethics.“ Principles contained in it come out of four basic principles of medical ethics. This important document was agreed by the representatives of medical chambers on the Greek island Kos on 10 June 2011., Pavlína Zímová, Jana Zímová, and Literatura 20