The purpose of the study is to provide some alternative devices for analyzing Korean topicalized constructions on the basis of Head-driven Phrase Structure Grammar. The author suggests that the existing theories relevant to the Korean topicalized constructions do not seem to effectively capture the elusive syntactic properties of topicalization. It is also suggested that once the feature [TOPIC+] is intantiated on the Korean topicalized element, the syntactic feature [DEF+] also be instantiated on the topic simultaneously. The study maintains that the Korean topic marking form ``un/nun`` be incorporated within the argument structure list, which is to ensure that both SUBJ and COMPS can be extracted to be a topicalized element. (Pai Chai University)