The study aimed to identify the effectiveness of mental imagery strategy in developing Listening Comprehension skills of first grade secondary students at AlBukayriah city. The sample of the study consisted of (56) first year secondary school students, equally divided into control and experimental groups. The study used the quasi-experimental design. The researcher prepared a list of five listening comprehension skills, a test of listening comprehension skills, and by using independent samples t-test, the study revealed the following result: There were statistically significant differences between the mean scores of the experimental group and the control group in the post-test of listening comprehension skills in favor of the experimental group. In light of the findings, the study recommended to: 1- Train English teachers to use mental imagery strategy in teaching listening comprehension skills. 2- EFL teachers should change their methods of teaching and select effective strategies which involve the students in the learning process and activate their role in the listening lessons. 3- Encouraging using strategies that enhance the student' self-learning during listening lessons such as: mental imagery in order to develop their listening comprehension.