Journal writing is a kind of diary where students can write manythings. It is useful in that it helaps improving students' writing skill in general, and a good way to practice writing. this study aims at revealing the impact of journal writing on the students' writing proficiencies. The research design used was quasi experiment of one group pretest-post test design. The subject of the research was the students of English EDucation Department joining Writing 4 Class in academic year 2008/2009. The result of the study showed that there was a significant difference of the students' writing proficiencies before the students get journal writing and after the students get journal writing
