Abstract
 Aim: Type D personality is defined as a type in which negative affecttivity (NA) and social inhibition (SI) are prominent. Type D personality is associated with psychiatric symptoms. The aim of the present study is to investigate the relationship between Type D personality and impulsivity in a non-clinical population. 
 Materials and Methods: In total, 462 undergraduate health Professional students were recruited to the study. Subjects were evaluated using Beck Anxiety Inventory (BAI), Beck Depresssion Inventory (BDI), Barratt Impulsivity Scale-11 (BIS-11) and Type D Personality Scale (DS-14).
 Results: The frequency of type D personality was 39.6%. The BAI, BDI and BSI scores were higher in participants with Type D personality compared to the group without Type D personality. Correlation analysis demonstrated that Type D personality was posivitely correlated with the severity of depression and anxiety. Impulsivity scores measured by the BSI was posivitely correlated with Type D personality, depression and anxiety scores. Regression analysis demonstrated that impulsivity was predicted by male sex and depression scores.
 Conclusion: Type D personality was correlated with the severity of depression and anxiety. Depression scores and male sex predicted impulsivity.