Purpose: The purpose of this study was to investigate the role 
of the Affective and Emotional Temperament on self-harm 
behaviors satisfaction mediated by the childhood trauma.
Materials and Methods: The Method of the present study was 
descriptive-correlational research using structural Equation 
Modeling (SEM) method. The statistical population of the 
research was all students between the ages of 18 and 25 in the 
city of Mashhad that 630 of them were selected through 
convenience sampling technique. From 630 questionnaires 
that were distributed among the participants, a total of 623 
questionnaires fulfilled the required analysis criteria. The 
instruments for data collection included The Deliberate SelfHarm Inventory, The Affective and Emotional Composite 
Temperament (AFECT) scale and Childhood Trauma 
Questionnaire. The data were analyzed using Pearson’s 
correlation coefficient and the Structural Equation Modeling 
(SEM) technique. 
Findings: The results indicated that the hypothesized model 
had a good fit with the observed data. Affective and Emotional 
Temperament showed a significantly correlation with selfharm behaviors. Path analysis indicated that the relation 
between Affective and Emotional Temperament and self-harm 
behaviors mediated by childhood trauma. 
Concluion: Considering these variables are important in the 
prevention, diagnosis and treatment of self-harm behaviors as 
well as in promoting mental health among general population.