Abstract: The subject of the research is the functioning of the author's speech in plays of a Spanish playwright Alejandro Casona. The author of the article examines the mechanism of reinforcing imagery and suggestiveness of a play by using expressive potential of the author's speech. Among other particularities of Casona's dramatic style, the author of the article underlines poetic equivalence of a stage dialogue and author's speech, functional and linguostylistic variety of remarks, their impressive nature and dialogue with an interpreter. In her article Schepalina provides a wide illustrative material that allows to prove the theoretical concepts of the research. The author has also applied methods of context, component, discursive and stylistic analysis, observation, generalisation and description. The scientific novelty of the research is caused by the fact that Alejandro Casona's plays are understudied in Russia. The author of the article makes a contribution to the concept of the Spanish theatre and genre features of plays. The author's analysis of Casona's comedies allows to conclude that the author's speech does not only place the action in a micro- and macro-situational context but also serves as a poetic sign.