The purpose of this study is to examine the contribution of anger, gratitude and psychological well-being in predicting forgiveness. The study group consists of 221 adult (62% female and 38% male). Anger-Anger Style Scale, Gratitude Scale, Psychological Well-Being Scale and Heartland Forgiveness Scale were used as data collection tools. In analyzing the data obtained, Pearson moments correlation analysis and regression analysis were used. Research findings showed that there was a negative relationship between trait anger, anger-in sub-dimensions and forgiveness; there were positive relationships between the anger control sub-dimension, gratitude, psychological well- being and forgiveness. It has been determined that the common effects of these variables explain 42% of the variance of adults for forgiveness. In the light of the findings obtained from the research, suggestions for future research are presented.