This study aims at suggesting teaching contents and methods on English syllable structures to primary school pre-service teachers by analyzing their ability of counting the syllable numbers of English words and their understanding on the difference between the syllable structure of Korean and English. The results of the evaluation and survey show that the subjects know the syllable numbers of 68.9% words and that the understanding and knowledge on the difference on the syllable structures on the two languages is very limited and superficial. Based on the results the following the three teaching contents and methods are suggested. First, the subjects should improve their understanding on the various and complicated English syllable structures. Second, the diphthongs in English should be presented and practiced as one vowel by using differentiated phonetic symbols in size and glides /y, w/. Also the concept of strong and weak part in diphthongs should be used for the vowel + glide, like /ay/. Third, the consonant clusters, which are the most difficult components in English syllable structure instruction, should be introduced and practiced gradually from less complicated clusters to more complicated clusters. Better understanding on English syllable structures will help the subjects to develop
themselves to be efficient communicators in English and effective teachers of English pronunciation.