Writing is the most difficult skill to master and to learn because in writing activity the students must find ideas and develop the ideas. Mind mapping is one of an alternative strategy to improve the student's writing skill. Mind mapping helps students to think creatively, associate ideas, and make different connections. The aims of this research are to know how the students make mind mapping in their writing skills and to find out the student's problems when they make mind mapping. The data were gained by interviewing four students' of English Language Education Department of Universitas Muhammadiyah Yogyakarta. The result showed that there are six points related to how make mind mapping by the students including choosing and writing the title of mind mapping, putting main ideas on top of mind mapping chart, making arrows/lines in the vertical way, writing main points of mind mapping, giving a number/note/color on each point of mind mapping as label to guide in mind mapping, and developing results of mind mapping in the description format. Additionally, there are two points which discuss the student's problems in making mind mapping, including looking for appropriate main points and making connections between the main points.