This paper presents a non-raising and discourse-based approach to Korean ECM constructions. Against the popular view that matrix object of ECM is a result of SOR, it is suggested in this paper suggests that matrix object is a sentential contrastive Topic adjunct, which is base-generated in the matrix clause. It is thoroughly argued that the previous analyses based on obligatory or optional SOR are not entirely free from certain theoretical stipulations caused by the movement-related operations such as movement chain, case filter, and Projection Principle. These difficulties are mainly due to the fact that Korean ECM constructions have a fully projected embedded clause (i.e. CP), instead of defective TP. For example, the availability of overt or covert embedded subject in the ECM construction is one of the empirical drawbacks under the SOR analysis. On the other hand, a non-raising analysis provided here is based on the assumption that matrix object of Korean ECM is a sentential contrastive Topic adjunct, which has a prosodic prominence. The greatest advantage of our analysis is that it is totally free from all the syntactic problems shown in the previous analyses. In other words, matrix object of Korean ECM is not a result of either optional or obligatory SOR. As an alternative approach to the SOR analysis, a non-raising analysis of Korean ECM constructions is on better theoretical and empirical ground.