Object-oriented software construction is a kind of promising software methodology, and leads to a whole new way of solving problems. In the research on rapid construction of Structured Editor (SE) that support detailed design and coding in software development, a generator that can generate the SE has been applied as a metatool. The ker-nal of SE is a syntax-directed editor based on the object-oriented concepts. One of the key issue in the design of SE is how to represent the elements of a target language by means of the class conepts internall.In this paper key concrpts,design of the SE and its generator as well as implementation of a prototype are to be discussed.