The purpose of this study is to clarify the visual characteristics in opera houses. We prepare to investigate the form of opera houses to evaluate the relationship with various factors (especially the sets, actors and audiences) and the general impression of the seat environment and so on at various seats in typically planned opera houses. Also we make calculations of four parameters and the physical quantities that express the visual space at seats, like the proportion of the screen, which are expressed in the vertical screen of the view of the actors and the sets, that is concealed by audience members seated in front, handrails and so on interrupting the view of the screen. Then we make a correlation analysis between psychological evaluations and the four parameters and the physical quantities. As a result, we lead to the a comprehensive guideline for the design and evaluation of visual characteristics in opera houses.