Globalization has allowed the contact among workers from different countries and cultures. The objective of this study was to investigate interpersonal conflicts involving Brazilian and foreign workers in the sector of electrical and electronic appliances, in the Free Zone of Manaus. Fourteen Brazilian workers were interviewed about conflicts with other Brazilians and foreigners in the workplace, including triggering factors of conflict, the episode of conflict and its consequences. The triggering factors of conflict were organized into seven groups: (a) Productivity and efficiency (b) Work methodology and planning, (c) Hierarchy, command and leadership, (d) Institutional or company problems, (e) Communication and interpersonal relationships, (f) Ethical and moral issues, (g) Cultural and educational differences. The conflict was typically part of an ongoing relationship and not only a specific interaction and showed positive and negative consequences according to the participants. Cultural differences were recognized in the relationship with foreigners and with other Brazilians. Conflicts with foreigners showed greater diversity and intensity, but more positive outcomes when compared with interpersonal conflicts among Brazilians. It may be concluded that cultural differences affect interpersonal conflicts but these differences are present not only in the relationship between Brazilians and foreigners but also among Brazilians of different origins.