The study aimed to explore the relationship between type D personality and psychological distress in coronary heart disease patients. It was proposed that people having type D personality are more likely to have psychological distress, which ultimately leads to coronary heart disease. One hundred fifty heart disease patients were included in the test of the hypotheses. There were 90 men and 60 women aged 45 years and above from different heart disease hospitals took part in the study. For data collection, along with the consent form and demographics sheet, Two scales were used i-e., A 14-item Type D Personality Scale was used to measure the Type D Personality, and a 10-item Psychological Distress Scale was used to assess the Psychological Distress among the selected sample. Statistical analysis showed that there is a significant relationship between type D personality and psychological distress among coronary heart patients. Furthermore, results also revealed that there were no significant differences found among men and women developing heart diseases in relation to type D personality and psychological distress. Heart diseases are increasing day by day, and they are reported as the “leading cause of death” all over the world. The current research focused on the association of type D personality and psychological distress among heart patients to highlight that both of these variables prevailed among the chosen sample.