Many psychological theories emphasize the significance of early childhood events. A review of the literature reveals that studies concentrate on the consequences of adverse childhood experiences on the physical and mental health of individuals. A few studies have so far examined the effects of positive childhood experiences on mental health. This research aims to investigate the relationship between positive childhood experiences and happiness. 695 adults (488 female and 207 male) participated in the study. Positive Childhood Experiences Scale served to gather the data regarding the childhood experiences, and The Oxford Happiness Questionnaire is employed to measure the happiness of the participants. According to the results of this study, a positive correlation was found between positive childhood experiences and happiness. Positive childhood experiences explain 23% of happiness and 24% of life satisfaction. In parallel to positive childhood experiences points, the happiness and life satisfaction of the participants also increases. According to the happiness level of participants, those who inform to be very happy have higher levels of positive childhood experiences in comparison to those who feel a moderate level of happiness or declare to be unhappy. The results are discussed in the context of the literature.