The purpose of this study is to find the syntactic rules in quotative clauses in 18th Century Korean. This paper can be summarized as follows. Quotation is classified into direct quotation, indirect quotation, and formal(explanatory) quotation. Indirect quotation is classified into abstract indirect quotation and transformational indirect quotation. Formal quotation has a form of quotation but it is not quoted from one`s speech or the writings. Formal quotation is classified into `naming formal quotation` and `naming object formal quotation`. In the `naming formal quotation`, formal quotation is put on `naming`. In the `naming object formal quotation`, formal quotation is put on `the object of naming`. In the `naming formal quotation`, examples of verbs and adjectives are rare, but in the `naming object formal quotation`, many examples are found.