In an ethnographic study of breast cancer support groups for white women, the authors describe the cultural model of illness and recovery espoused by the groups and examine contested areas that might influence participation. Through analysis of interviews, observation at meetings, and program documents, they develop a model of group culture that includes five components: recovery narrative, group metaphors, perceived benefits, group processes, and contested domains. The recovery narrative focuses on optimism and personal growth, and members invoke metaphors of family and sisterhood to describe their relationship to the group. Linkages are made between perceived benefits and group processes. Contested domains challenge dominant features of the recovery narrative. The authors discuss the value of cultural studies of illness support groups for understanding member-group fit.