Over the past few decades, the role of attachment in human life has been analyzed by many scientists. Attachment is one of the most basic motives of human behavior to provide a sense of security. Increasingly, the importance and impact of the attachment style shaped in childhood on interpersonal relationships in adulthood are emphasized. The child’s attachment to the parent is a prototype for later relationships with the spouse or other people from the immediate environment. Authors of the article present a new research method - Attachment Styles in the Family of Origin (ASFO) - which can be helpful in determining the attachment style formed during childhood (up to the age of 12). The questionnaire consists of 4 scales measuring 4 attachment styles: safe style, anxious-ambivalent style, avoidant style and rejecting style.