The purpose of this study was to identify family caregivers’ experiences in managing the behavioral and psychological symptoms of dementia (BPSD) with particular focus on their interpersonal interactions with patient with dementia. Data were collected through focus-group interviews with 15 family caregivers from three local dementia-support centers located in Seoul. Data were analyzed using content analysis. Three main themes were identified through data analysis: triggers of BPSD, family caregiver’s actions in response to BPSD and patient’s reactions, and the effect of BPSD on family caregivers. Findings demonstrated that BPSD depended on the complex interplay of family caregivers and patients, including their interaction style. This information could help nurses when counseling and educating family caregivers to improve or modify their attitudes and approaches to behavioral symptoms of patients.