Research ethics is always important. However, it is especially crucial with sensitive research topics such as family violence. The aim of this article is to describe and discuss some crucial issues regarding intimate partner violence and child maltreatment, based on the authors’ own research experiences. We focus on and discuss examples concerning the definition of family violence, research design, ethical approval, participant recruitment and safety and data collection and processing. During the research process, the significance of teamwork is emphasized. Support provided by the participants to each other and support given by experienced researchers within the team is very important for high ethical standards.