This study aims to investigate the relationship between the students' achievement in learning English language and the use of the grammar learning strategies in learning English language. The participants are 43 male and female students from grade 4 from the Department of English, College of Arts, University of Anbar. The study was conducted during the first semester of the academic year 2022-23. To achieve the aim, two questions were formed: "Is there a relationship between the students’ achievement and the use of grammar learning strategies?" and "To what extent do the EFL grade 4 students use grammar learning strategies? "A questionnaire and a diagnostic test were used to collect the data. The results revealed that there was no relationship between the students' achievement and the use of the grammar learning strategies. In addition, the level of the use grammar learning strategies in learning English grammar was medium.