In this bachelor thesis elaboration and design of firefighter robot for investigation of enclosed space was made. Thesis deals with market analysis and existing solutions, as well as customer needs. Functional decomposition and morphological matrix were created, and two concepts of machine design were proposed. Thereafter, an analysis of the request was carried out, where we evaluated the concepts by the given criteria and selected a better concept. For the chosen concept, a 3D model, technical documentation and a required calculations have been made. Targeted markets are professional and volunteer fire departments.