The present study aimed to investigate some differences in journal article abstracts written in English by Korean researchers and international scholars and to provide Korean researchers with guidelines for writing accurate, self-contained, informative and coherent abstracts. To this end, intra- and inter-lingual analyses of English abstracts were carried out in terms of rhetorical structures, linguistic features, and disciplinary areas. The results reveal that (1) international and Korean researchers show some differences of rhetorical and discourse features in their English abstracts and (2) some types of errors in terms of grammatical-syntactic and lexico-semantic aspects are frequently committed by Korean researchers. The results of this investigation suggest that Korean researchers should be aware of common rhetorical structures and linguistic features of English abstracts and graduate students should be provided with EAP courses to practice writing English abstracts relevant to their major areas.