Collocation Problems in Writing at the Fourth Semester Students of IAIN Langsa

The research investigated about collocation problems in writing and the cause that happened in the fourth semester students of English department in IAIN Langsa. The writer applied Qualitative research with qualitative descriptive design. The subject of the research were the fourth semester students of English department, it contains of a unit that consist for 18 students. To collect the data, the writer selected documentation and interview as instruments. To analyze the data from documentation, the writer used collocation’s references of Oxford Collocation’s dictionary application. To analyze the data interview, the writer used data reduction, data display and conclusion/verification. The writer found 13 students that have collocation problems and 5 students that did not use collocation in their writing. However, there are 7 students that used right collocation in their writing. Whereas the main problems in collocation for lacking vocabulary and lack of lecturers explanation. The students need to learn and practice to write with collocation in a daily life. In conclusion, the students need to explore all of aspect in English so they can construct their essay more natural.