In Intimate Partner Violence (IPV), prevention and countermeasures are important since it is not easy to interrupt the relationship between the victim and the perpetrator and can become chronic. However, the reduction in their recidivism rate is insignificant. This may be because the heterogeneity of IPV perpetrators is not considered in offender classification and treatment. This study aims to promote theoretical understanding of IPV perpetrators through literature review and to suggest direction of improvement in probation practice. Previous studies tried to classify IPV perpetrators into partner-only perpetrators (POs) and generalized violence perpetrators (GVs), and presented antisociality as a key dimension that essentially distinguish one from the other. The chronic and widespread pattern of violence in GV originated from high antisociality formed by the interaction of environmental and genetic factors from childhood. On the other hand, the PO has relatively low antisociality, and the adherence of the wrong conflict resolution method is presumed to be the cause of violence. Therefore, PO and GV can be seen as completely different types of perpetrators depending on the level of antisociality, and the application of classification and intervention programs considering the heterogeneity of IPV perpetrators is necessary. Suggestions for probation practice are discussed from the perspective of offender classification and intervention programs.