The rapid development of the Internet has granted college students easy access to vast amount of online resources, and to some degree has increased the chances of plagiarism problems. A number of studies have suggested that both faculty’s and students’ perceptions toward plagiarism are found to be influential on students’ plagiarizing behaviors, and limited research has been done to explore the perceptional differences between these two roles. This study aims to respond to the growing educational concerns about plagiarism by comparing the perceptions held by faculty and college students. A total of 229 faculty and 634 college students in Taiwan completed the Perceptions of Student Plagiarism Questionnaire designed for the study. The results reveal that faculty held stricter standards than those of students. Results also indicate various causes of plagiarism, such as no interest in the learning subjects, lack of citation knowledge, or lack of research ability. Furthermore, significant disciplinary differences were shown to contribute to students’ plagiarism perception; the results reveal that most students with an Arts or Communication major held a relatively adverse thinking toward plagiarism. Last, this study provides research-based strategies for school and faculty to reduce the likelihood of plagiarism.