The aim of the paper is presentation and critical analysis of Kazimierz Ajdukiewicz's concept of the world-view. Ajdukiewicz's philosophy was strongly inspired by the rationalism of Kazimierz Twardowski as well as by some ideas of the Vienna Circle. However, in contrast to the latter's logical empiricism, Ajdukiewicz could be interpreted as holding that beliefs constituting our world-view have both logical value and cognitive content—they cannot be construed as mere expression of some emotions.