Introduction There have been studies on similarities and differences in the realization of speech acts by Vietnamese speakers and English speakers. Nevertheless, pragmatic transfer has not been investigated in studies on Vietnamese learners of English. The influence of language learners’ linguistic and cultural background on their performance of linguistic action in a second language has been a focal concern in interlanguage pragmatics. Among non-structural factors interacting with pragmatic transfer is second language proficiency, which has been found to constrain pragmatic transfer in requesting (Blum-Kulka, 1982). The effect of gender on pragmatic transfer is also taken into consideration though it has drawn less attention. Addressing differences between English and Vietnamese in request perception and production, this study will deal with pragmatic transfer of interlanguage requesting by Vietnamese learners of English. The constraint of contextual factors and the effects of language proficiency and gender on pragmatic transfer are to be examined. Luận văn chia làm 3 chương