In qualitative criminological research, focus groups are a well-known method that are regularly applied and reported on in literature. The Nominal Group Technique (NGT) has so far hardly ever been applied, let alone reported on. This chapter elaborates on the NGT, and discusses its advantages and disadvantages. These advantages, disadvantages and limitations are better illustrated with reference to a practical example. We give an example of the NGT in action in criminological research, by reporting on the use of the NGT in a study on the needs assessment of drug prevention and drug education. In the evaluation, we illustrate the possibilities and limitations of the NGT by comparing this technique with the focus group technique, since this was applied in the study as well. The NGT is a highly structured technique with characteristics of an individual survey and a focus group. The structure limits the influence of the researcher and of group dynamics and it encourages the more passive group members to participate. It is an ideal technique for gathering and prioritizing ideas. Moreover, it can be used with respondents with limited reading and writing capacities and with limited verbal capacities. The NGT has some advantages that hold potential for research in the field of criminology. The technique can be used to give a voice to less powerful groups of people in research and priority setting: prisoners can be asked for strategies to improve living conditions, local communities can give their ideas on how to counter insecurity, etc. Since the NGT limits the influence of group members with perceived high status, the technique is particularly interesting in research where participants have different levels of power, e.g. police officers with a different rank or in mixed groups where professionals and, for example, victims participate. Since verbal capacities are not the fundamental basis for power during the NGT, in criminological research this could apply to detainees with disabilities for instance. The NGT has one mayor disadvantage, especially for qualitative research: it does not allow for sufficient qualitative depth to be added to the research results, contrary to focus groups. Therefore, combining the NGT with focus groups is optimal to gain an in-depth insight into people’s ideas and needs. Keywords: qualitative methodology, focus group, group technique, drug prevention drug policy