This study is about conflict experiences of teenagers in Sweden and Poland. The study has two purposes. The main purpose is to delimit and describe the feelings that constitute the essence of conflict experience. The second purpose is to establish possible differences between Swedish and Polish teenagers, concerning the essence of conflict experience. This study is anchored theoretically and methodically in phenomenology. The data has been collected through the "self-report" method and analysed by means of Van Kaam's empirical phenomenological approach. The phenomenological analyse has resulted in the delimitation of three constituents which are essential for the conflict experience. The essence of this experience is of anger, feelings of mental strain and feelings of unfair treatment. Feelings of anger are both the most common and the most explicit expressed in the data. Anger is an immediate experience in conflict situations and doesn't come gradually. Even though anger is an immediate and not a gradual experience, it can vary in strength and intensity during the conflict. If the anger accelerates or reduces depends among other things on the applied management strategy and on the way the opponent is acting in the conflict. Feelings of anger are very hard to master and they practically always lead to some form of manifestations or a will to manifest. The manifestations of the anger are most often directed against the conflict party. Feelings of mental strain are characterised by a big complexity as regards their character and consequences. Unlike anger feelings of mental strain aren't immediate and can arise gradually. Feelings of mental strain start with small symptoms, which becomes more disturbing as time passes on. As a result different mental and somatic reactions can appear. The teenagers describe a vary set of such reactions, for example eating disorder, sleeping problems and suicidal thoughts. Unlike anger the manifestations or the will to manifest feelings of mental strain isn't very common. Crying is the only conspicuous way to reduce inner tensions and to get an outflow of these unpleasant feelings. The manifestations that appear are also very seldom pointed against the other party. Here you can observe a tendency of isolation and hiding of feelings of mental strain. Feelings of unfair treatment arise due to treatment that the person finds not just and undeserved. These feelings can for example be based on an incident when the person is blamed for something he/she hasn't done, or has done in another way or for another purpose. Misinterpretations of what was said or the intentions of statements that are regarded as groundless or distorted can also cause these feelings. The teen34 agers regard all unfair treatment in conflicts as hurting and offending. However, feelings of unfair treatment are more hurting in conflicts with adults than with other teenagers. Feelings of unfair treatment don’t come gradually. They arise suddenly similar to anger, but they are not as immediate as anger in conflict situations. One of two purposes of the study was to explore if there were any differences between Swedish and Polish teenagers concerning the essence of the conflict experience. A comparative analyse has shown that the essences of the conflict experience is the same in both national groups. There is a real experience-unity between the Polish and the Swedish teenagers, who in their stories use almost the same terms and expressions. Even though anger, feelings of mental strain and feelings of unfair treatment is the essence of conflict experience in both countries, the context, consequences and intensity of feelings may vary within national groups as well as between the national groups. The intensity of anger, which in average is higher in the Polish group, can serve as an example.