U nderstanding t he e lements or s tructural c onstituents of t he m odern t heater is not e nough. It s hould be e xamined t hrough a m ethod according to which the characteristics of Modern Theater are harmonized and lead to an organized system. Hence, the elements can only be understood through the whole body. This paper tries to achieve some results about the Modern Theater through a structural analysis. In doing so, some structural elements of the Modern Theater or Ridicule Theater are examined through UNESCO Theater and then the paper compares the differences between the body of this kind of theater and the traditional one. These differences clarify the essence of Modern Theater. One of the most significant differences is the language of the scene including movements, lightings, sounds, etc. which receives an important attention and increases the dramatic effect of the work.