This research aims to explore the causes of the English students’ anxiety and the ways they used to reduce it when writing academic papers. As known, anxiety in writing is a serious matter and requires sufficient attention. Using Mixed methods, this study collected the data through (1) Questionnaire (G-Form), and (2) Interview. The findings through data analisis indicate that the causes of writing anxiety are fear of negative evaluation, linguistic and grammar difficulties, time pressure, problems with topic choices, pressure for perfect work, insufficient writing practice, low self-confidence, high frequency of writing assignment and insufficient writing technique. Another finding also identifies ways to reduce the students’ anxiety through interviews there are: Taking a break by having a good air and deep breath, praying and drinking water, motivating themselves, and good preparation. In conclusion, knowing the causes of the students’ writing anxiety and using the right ways to reduce it, will maximize the writing outcome and minimize the possibility of anxiety.