抄録
The Theory of Poetry was formed in France about 1630∿1680. <<La vraisemblance>> and <<les bienseances>> are the central conceptions of the theory of this period. <<La vraisemblance>> provides for the subject or the plot of tragedy and <<les bienseances>> provide for the character in it. Both words derived from Aristotle's Poetics, which came through Italy. French theoreticians in 17th century made the laws of both rules, dictated by abstract and universal reason. <<La vraisemblance>> demands that poets should express the ordinal fact in this world. <<Les bienseances>> prescribe types for the characters of persons and each character is applied to them. Although taken from the ancient history, sometimes the plot of trgedy was modified by poets, because they had to match their works with the taste of public. And both laws require to imitate the eternal and universal existence, the truth, and they also require that tragedy expresses a better person. After all, both conceptions characterized classic literature especially in the imitation of nature, besides it seems that authors created the new quality of poem confoming to rules.
