Speech tools are varied, one of the most important types used by learners or speakers to communicate is stress. Speakers use stress to highlight the information they think it is important and if people do not use stress, the listener will be confused and there will be a misunderstanding for language. The objectives of the study were as follows: to reveal the most frequent type of word stress among 1st and 4th year students at ZU by given the participants almost 10 minutes to prepare the reading task and then reading it aloud. To achieve the first objective, the researchers interviewed 30 students; 15 of them are on the first year and the rest are at the fourth year. The second objective was to explore the factors which were emerged from the students' interview. To achieve the second objective, the researchers reached the data saturation by interviewed 12 students. The results of the study showed that first year students make mistakes in pronouncing the stress more than fourth year stud