This study examined the effects of ascertainment of negative feelings of victims with positive facial expressions and intentionality on interventions. Participants were 50 undergraduate students. Almost of them had selected occupations as child care worker after graduation. The experimental design was intentionality (2: intentional, accidental）× ascertaining victim’s affection (2: ascertaining, not ascertaining). Results showed that subjects encouraged perpetrators to apologize to victims when subjects ascertained victim’s negative feelings, or when perpetrators had hurt victims intentionally. Additionally, Subjects considered perpetrators feeling guilty higher in situations that they had hurt victims accidentally. It was also indicated that subjects encouraged perpetrators to apologize sincerely than instrumentally when perpetrators had hurt victims intentionally and victims’ negative feeling were ascertained.