This paper explains the relationship of attachment between a child and a parent or guardian, describes the development of attachment in childhood, presents a historical overview of attachment research, and the work of scientists who have researched this area of psychology. Attachment is a strong bond that a child develops intensively in early childhood toward a person who responds to his signals and who meets his needs. Meeting the need for physical contact is especially important. A secure pattern of attachment, an anxiety-avoiding pattern of attachment, a resisting pattern of attachment, a disorganized-disoriented pattern of attachment, and child behavior for each of these patterns are described. The most common objects of attachment are shown - mother, father, siblings, grandparents, the most common interactions they have with the child are described and the ways of behavior that favor the creation of a strong emotional connection with the child are explained. The difference between children who developed a safe pattern of attachment and children who developed an insecure pattern of attachment is shown. Children who have developed a secure pattern of attachment show significantly higher development of social and cognitive competencies than children who have developed an insecure pattern of attachment. The attachment style that an individual develops in childhood has a great influence on his ability to create peer and friendly relationships, which is shown through a survey conducted for the purposes of this paper. Attachment characterizes childhood, but has a significant impact on many aspects of life in both adolescence and adulthood. The development of a secure attachment in childhood ensures a higher quality of life.