Transformations of poetics on the breakthrough of 20th and 21st centuries in the Slovak marionette theatre are outlined by the authoress in broader circumstances, with the background of avant-garde and studio theatre movements mostly in Bohemia. Entering of a live actor into the marionette theatre stage caused the most significant changes of poetics. Under this influence the marionettists disentailed from the tutorship of illusion play, freed from interpretation and stage director theatre and thanks to this, the marionette theatre has become close with the movement of unofficial experimental groups, has freed itself from isolation. A trend to leading to an increasing participation of live actors which started in 1959, has reached bigger size after 1989. Positive results brought through this impact could be seen in the Slovak marionette theatre in the 90-ties, in overtaking methods and programme of author's theatre which had been worked out by the Czech studio theatres in the seventies. An absolute novelty is also the interest of marionettists into paratheatrical, therapeutic theatre activities (Doctor Clown, mentally handicapped or with hearing loss handicap and so on), what also belongs to developing of the message related to inter - war avant-garde.