Title: Knowledge of the Principles of Public Behaviour in Emergencies among Ninth Grade Pupils of Primary Schools in Prague and Litoměřice Objectives: The diploma thesis aims to determine level of knowledge of principles of public behaviour in emergencies among ninth grade pupils in Prague and Litoměřice, specifically floods, chemical accident, fires and storms. Methods: compilation, survey questionnaire, analysis Results: Knowledge of the Principles of Public Behaviour in Emergencies among Ninth Grade Pupils were above average. Success rate of right answers was detected at 76 %. The knowledge of this specific field is sufficient due to overview teaching. At only three questions the answers did not exceed 50 %. As a weak spots can be indicated knowledge about general warning and principles during chamical accident. In comparation Litoměřice had better results by two percentage points than Prague. Men did less wrong answers than women by 4 %. Keywords: flood, fire, chemical accident, storm, evacuation, questionnaire