EFL learners at all ages and proficiency levels are usually confronted with various problems in vocabulary learning and retention. This study sought to introduce strategies for improvement of vocabulary learning and retention. Therefore, the effects of using aural/visual storytelling on Iranian EFL learners' vocabulary learning and retention were investigated. To do so, 50 intermediate female EFL learners were randomly assigned to two groups. After the administration of teacher made English Vocabulary Test as the pre-test, aural storytelling method was used for the control group, and visual storytelling method was used for the experimental group. After three months of instruction, the aforementioned teacher made English Vocabulary Test, as the post-test, was given to the students of both groups to assess their improvements. Two weeks after post-test, they were given a delayed post-test to measure their retention of English vocabulary knowledge. The reliability of the English Vocabulary Test using Cronbach's Alpha was estimated equal to 0.80. Finally, Using ANCOVA, the results revealed that, the experimental group's participants outperformed those of control group in both learning and retention of English vocabulary. So, it can be noted that the training program according to visual could have impressive impact on the learning and retention of vocabulary knowledge.