The objective of this study is to explore the probable relationship between Iranian students' socioeconomic status, general language learning outcome, and their beliefs about language learning. To this end, 350 postgraduate students, doing English for specific courses at Islamic Azad University of Neyshabur participated in this study. They were grouped in terms of their socioeconomic status. They answered a questionnaire in which they indicated their beliefs about language learning in different contexts of language use. Besides, a general language test of proficiency (a Practice test of a TOEFL Test) was administered to all the participants to homogenize them in terms of general language proficiency or general language learning outcome. The quantitative data were subjected to a set of parametric statistical analyses, including descriptive statistics and factor analysis. The findings manifested a positive relationship between the students' economic status and general language learning outcome. Besides, the findings manifested a significant relationship between the participants' language learning outcome and their beliefs about language learning. The findings suggest if language instructors are equipped with the necessary information to assist language learners in coping with their negative beliefs, the process of language learning is not only accelerated, but also probable measurement errors may decrease.