Medical patients construct schematic representations of illness which may impact on their recovery and adjustment with their medical condition. The purpose of the present study was to examine relationship between the history of myocardial infraction (MI) and illness representations among post-MI patients. One hundred seventy six consecutive patients following MI admitted to the CCU wards were selected. Brief Illness Perception questionnaire (B-IPQ), Beck Depression Inventory and demographic questionnaire were used. Chi-squared test, Student's t-test, MANCOVA and Covariance were used to analyze the data. The findings showed that 30.1% had previous MI. The results of MANCOVA indicated that Significant difference between two groups in B-IPQ scores (F= 2.653, P= 0.025). The results of covariance showed that significant differences in three domains of illness perception including identity (F= 4.776, P= 0.03), consequences (F= 70671, P= 0.006) and timeline (F= 10.092, P= 0.002). However, there were no significant differences in controllability (F=0.165 P= 0.687) and treatability (F=0.26, P=0.611) between two groups. Findings confirmed that the post MI patients with previous MI form more negative illness cognitions than the post MI patients with first MI, that is, they interpreted their MI as a more adverse event. Thus, previous MI may impact on perception of identity, consequences and timeline of MI. However, these findings did not support such effects for perception of controllability and treatability of the disease. Therefore, post MI patients with previous MI likely develop negative schema about some dimensions of illness perception.