Plagiarism is believed as a behavioral problem of students in the field of academia and one of a centered question to both faculty and administration in universities and higher education institutions. Plagiarism directly influences the academic reputation of a higher education institution and equitable academic credit for their students. In recent years, several initiatives have been taken to control the reasons for involving academic dishonesty of students by the university authorities worldwide. Awareness of students in plagiarism is the foremost fact with regard to prevention. This study is conducted to determine the awareness about plagiarism of international students while they are studying in Sri Lanka. International students studying in the Post Graduate Institute of Pali & Buddhist Studies (PGIPBS), University of Kelaniya were selected as research pillars. PGIPBS is a leading institute for Buddhist Studies and a great number of international students are pursuing higher degrees annually and most of them are coming from Asian countries. The methodology adopted for the study is survey design and a self - administrated questionnaire was used to obtain data from Sixty-four (64) international students. Result shows that international research students are extremely immature regarding plagiarism and even thirty-five percent (35%) of them could not understand the meaning of the term „plagiarism‟. The result of the study indicates that plagiarism found in a thesis is responsible only for the student itself, but both supervisor of that particular thesis and student are responsible. All respondents agreed that they need to acquire comprehensive knowledge on plagiarism and they like to participate when the PGIPBS commence an awareness session for plagiarism. The present study is to be one of the first studies that examine the awareness of plagiarism of international students studying in Sri Lanka.