A total of 423 articles published in the Korean Journal of Medical Ethics between the years 1998 and 2020 were reviewed and classified. Of the total 423 papers screened, 216 articles (51.1%) covered clinical ethics. For analysis, six major categories and 25 subcategories were identified by referring to the contents of six clinical ethics textbooks. The six major categories consisted of theory and methodology, birth to death, doctor-patient relationships, professionalism, policy and legal issues, and others. Subcategories that have received extensive coverage in the 216 clinical articles identified include life-sustaining treatment, medico-legal issues, medical systems, and issues at the beginning of life (e.g. abortion). However, few if any articles have been published on topics in other subcategories, including truth-telling, impaired colleagues, gifts from patients, confidentiality, denial of treatment, unproven treatment, or physical/sexual abuse. This study highlights some of the areas of research that the Korean Journal of Medical Ethics should attempt to include in future editions of the journal in order to provide a more balanced coverage of the field of clinical ethics.