The climate of the class in a conventional and in an alternative basic school is the main topic of this master thesis. The master thesis is divided into two parts, the first part is theoretical and the second one practical. It the theoretical part the main focus is dedicated to an explanation of the terms concerning the theme. The thesis deals with the methods of diagnostics in a class climate. The second part, the practical one, consists of the research held in the school classes of the conventional and alternative type. The research is considered to be a quantitative analysis and its research instrument is a questionnaire. The practical part is intended as a comparison between the climate in the both types of schools. The main goal of the master thesis is firstly to compare school climate in the alternative and conventional school. Secondly the master thesis should interpret the discovered information.