Background and Purpose: Although, the outstanding scientific contributions of Iranians in the post-Islamic decades are clear to every body, but because the scientific resources are written in Arabic language at the time, separation of Iranians and Arabs share in the growth and development of traditional Islamic medicine would not be possible without research. Teherfore the general purpose of the research is to review Iranian scientists’contribution in authorship of Arabic manuscripts of Islamic medicine available in National Library and Archives of Islamic Republic of Iran.

Material and methods:  The research method was documentary and descriptive, and the research population consisted of 4000 Arabic manuscripts. The manuscripts list has been made using Arabic manuscripts catalog available in National Library and Archives of Islamic Republic of Iran, editions 7-19. Manuscripts checklist of Islamic medicine in Arabic language including title, author, authorship date, subject, and writing date. Some major biographical books were used to prove the Iranian nationality of authors and scientists. Data analysis was done using SPSS and Excel softwares.

Results: From among 4000 studied manuscripts, the subject of 186 titles were Islamic medicine. From these titles 109 titles were authored by Iranian scientists, 50 titles by non-Iranian, and 27 titles by the authors that their nationality was unknown. The maximum percent (37/6) of Arabic manuscripts of Islamic medicine written by Iranian scientists was written until 6th century.

Conclusion: The research findings show more contribution of Iranian authors in Arabic manuscripts than non-Iranian ones. In other words, Iranian scientists have possessed remarkable role in developing manuscripts and improving Islamic medicine in Islamic civilization era.