This study aims to clarify the mental transformation process of bereaved crime victims faced with completing social activities. Longitudinal semi-structured interviews were conducted twice with 10 bereaved crime victims who were involved in social activities. The interviews of three participants were analyzed by using mapping method. The mental transformation of these bereaved crime victims involved two processes: (1) reconciling bonds with the deceased through social activities while holding conflicts as bereaved crime victims and (2) starting a new life as an individual with the deceased without being involved in activities while managing the conflicts associated with social activities. These processes are influenced by the society surrounding the bereaved family, and three of a feeling as a bereaved family involved in social activities, a feeling to the deceased, a way of interpersonal relationship of the bereaved families are all cyclically transformed. It became clear that there was an interaction among these processes. Based on this study’s findings, psychological support for bereaved families dealing with completing social activities should recognize the importance of interpersonal relationships and feelings of achievement regarding how they address their completing activities.