This study examined the impact of lecturer incivility on students in Vietnam and the moderating role of social support in academic settings. Using a quantitative approach, surveys were conducted among 1,158 students in Ho Chi Minh City who regularly faced lecturer incivility. Results showed a significant link between lecturer incivility and decreased academic performance ([beta] = 0.123) and self-efficacy ([beta] = -0.354), but not with emotional exhaustion. Student performance was also directly influenced by self-efficacy ([beta] = 0.451). Furthermore, the effect of lecturer incivility on self-efficacy was moderated by support from friends ([beta] = -0.103) and significant others ([beta] = -0.061), but not from family. This study highlights the importance of addressing lecturer incivility and the unique role of social support in higher education.