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Background The purpose of this study was to report interaction patterns among Iranian authors of emergency medicine using social network analysis methodology, focusing on coauthorship network. Methods The bibliographic data of Iranian authors on the ‘emergency medicine ’ field during the years 2001– 2011 were retrieved from the Science Citation Index Expanded database. Co-occurrence matrices were made by BibExcel and were imported to Ucinet and NetDraw to delineate coauthorship network. To detect structural patterns among authors, we considered some measures of social network analysis, such as density, centralisation indices, component analysis and cut-points. Lastly, subject experts separately analysed the content o