The author advocates for an interdisciplinary understanding of sociology. The starting point of his considerations is the Platonic concept of dialogue. Far from being obsolete the concept enables us to define dialogue adequately and to indicate both advantages and obstacles of the dialogical practice. The last part of the article shows, that dialogue is a mode to overcome some important problems of contemporary sociology. It is also the main factor of interdisciplnary research programs. The author reconstructs ideas of selected classical and contemporary theorists accentuating an often underestimated but still stable stream of dialogical sociology. In the author's opinion, sociology should not only focus on dialogue, but should become itself dialogical.