A study was conducted about an `intimacy gradient', the tendency that more positive person perception and prosocial behavior appear toward a person when the person is close to us than when he or she is less close. Forty-six male and 70 female Canadian undergraduates participated in this study. They rated three object persons differing in intimacy level. Two kinds of five-point scales were used: 11 items for person perception and six for affiliative/altruistic behavior intention. Each subject's total scores were calculated for object persons of each scale. Total scores of less close object persons were subtracted from those of close ones and these results were used as measures of intimacy gradient. Affiliation need, fear of crime and perceived social overload were measured by six-item five-point scales. Relation-ships of intimacy gradient measures were negative with affiliation need, positive with fear of crime and not significant with perceived social overload.