This diploma thesis considers the theme of the art market in Czech republic. The cooperation between gallerists and artists is not following the professional tradition seen in American and European galleries. Those led the artist to present his artworks exclusively in one and only institution in return for services gallery offer him. The change of attitude in needed in both, galerists' and artists' parts. In my diploma thesis, I am confronting their opinions so I can create a model of their cooperation leading to a professionalization of the relationship.