Assistive technologies might be a suitable option for supporting people with dementia and their informal caregivers. To avoid "one-fits-all"-solutions and to design useful technologies, it is essential to consider the end-users' needs. The objective of this review was to examine the needs of people with dementia and their informal caregivers with regard to assistive technologies. We conducted a scoping review based on a comprehensive literature search in databases, handsearching, and free web searching. Additionally, we performed citation tracking of included studies. We included all types of study designs. Two researchers independently selected the studies. The results were thematically categorised by two researchers. The search yielded 7160 references. 18 of 24 included studies were qualitative. The studies had been conducted in 13 different countries, mostly in Europe. The sample size ranged between two and 270 participants. Most of the studies involved people with dementia as well as informal caregivers. The analysis resulted in eleven themes. The themes could be assigned to three domains: "needed technologies", "characteristics of needed technologies", and "information about technologies". The results might guide future usage, development and research addressing end users' needs with regard to assistive technologies.