This study aimed to investigate the effects of audio podcast retelling vs. corpus-based vocabulary learning on vocabulary knowledge development of Iranian English language learners. To conduct the study, 60 homogenous students were selected as the participants. They were divided randomly into three groups, two experimental groups and one control group, each consisted of 20 students. The participants then took part in the pretest. The first experimental group was treated via teaching vocabulary through podcasts, and the second one was treated via teaching vocabulary through corpus examples. Finally, all the participants took part in the posttest. The results of the data analysis showed that the participants in the corpus-based learning group significantly outperformed the participants in the podcast group. The results of this study could be