Given the importance associated with multiple-document literacy in the present-day knowledge societies and the dearth of research in English Language Teaching in general and English for Specific/Academic Purposes (ESAP) contexts in particular on multiple-document comprehension and the significance of reader beliefs in this type of comprehension, the present study was carried out with the aim of investigating the relationship between ESAP students' personal epistemological beliefs and their inferential intratextual and intertextual understanding of multiple texts. To this aim, 64 first-semester midwifery students were selected as the participants of the study. They were required to read four passages on multi-fetal pregnancy which discussed different aspects of this phenomenon. Having filled out the Epistemological Beliefs Inventory, they were tested on the inferential intratextual and intertextual comprehension of the texts. Results of the analyses of the data revealed significant associations between epistemological beliefs and the inferential comprehension of multiple texts. The results also indicated the poorer performance of the participants in intertextual inferential understanding of the texts compared with the intratextual understanding of them. The study concludes with tentative implication of the findings for ESAP reading courses.