The article considers theoretical aspects of attachment styles on stress resistance of adolescents. It is emphasized that under the crisis conditions developed over the past eight years in Ukraine, the need for targeted scientific analysis of the factors that form stress resistance, in particular the attachment style, is becoming increasingly important. Special attention was laid on the social significance of studying the attachment styles and their effects on the psychological resilience of adolescents in stressful situations. It is noted that the problem of the influence of the attachment style on adolescence is related to the violation of the child's emotional attachment to primary objects at an early age. It is emphasized that reliable attachment, which is formed at the age of an infant, plays a major role in the processes of creating a system of effective mental protection for a child and stimulates the development and improvement of prosocial behavior models, which affects the psychological stability of a person concerning mental trauma, psychosomatic and mental symptoms as well as forms the basis of stress resistance. The stress resistance of a teenager is seen as a complex of his/her personality properties, which provides an opportunity to respond adequately, without harm to mental health, to stressful factors, and helps him/her organize his/her behavior to effectively overcome a stressful situation. Stress resistance can ensure high activity efficiency and help to preserve the health of a teenager if he/she is potentially prepared due to the energy of emotional excitement. It is noted that since stress resistance is a potential and not an innate trait, it is a product of the interaction of a teenage child with the environment. And one of the most important factors in the development of stress resistance in teenage children is the presence of close relationships with caring adults. After all, stress resistance depends on personal characteristics that are formed under the influence of the presence of supportive relationships that arise at an early age.