This study aims to describe errors in the use of language based on the fifth edition of the EYD in scientific papers compiled by students of the Indonesian Tadris Study program at UIN SYAHADA, to describe errors in the use of EYD in student papers. The object of research is an analysis of errors in the use of EYD in student papers. The researcher found incorrect data in the first paper where there were the use of italics or foreign sentences where there were fourteen foreign sentences that were not italicized, while in the second paper there were seventeen foreign sentences that were not italicized. For errors in the use of capital letters, the second paper has eighteen errors, this is very different from the first paper where there are only two errors. For other errors such as the use of punctuation marks, the use of prepositions and spelling errors. This research includes descriptive qualitative. Data were collected by observing, documenting, and writing the intralingual condalingual method. The results show that the research paper found several EYD errors such as the use of spelling, capital words, prepositions, conjunctions, italics, and typing errors. Keywords: mistakes,Ejaan Yang Disempurnakan (EYD), university student papers