My dissertation project Double bass in Czech music of the 21st century with a focus on solo and chamber music literature in a historical and international context aims to convey a report about the state of the Czech contemporary music for double bass in the new millennium. The output value should be a summarization and cataloguing of new compositions, a comparison of the same and a description of them in both an international and historical context. An- other important aspect of this thesis is the case analysis of some pieces and a description of compositional techniques used. This work is meant to be mainly for musical high school (conservatories in the Czech Republic) and musical universities students and pedagogues, as well as double bass interpreters and others interested in this topic, who want to broaden their horizons and discover the state of the contemporary Czech literature for double bass and learn new and often superior compositions. First and foremost, an encyclopaedic style summariza- tion of contemporary double bass pieces should provide a useful tool for all readers interested in discovering new pieces for the deepest string instrument. Another important point of the thesis is a description and explanation of the most common interpretation techniques and a guide to their realisation in praxis.