Background: Decision making is an important part of managing one's life with dementia. Shared decision making is the preferred way of involving people in decisions. Our study aimed to describe the challenges of shared decision making in dementia care networks.; Methods: A multi-perspective qualitative study using face-to-face interviews with 113 respondents in 23 care networks in the Netherlands consisting of 23 people with dementia, 44 of their informal caregivers, and 46 of their professional caregivers.