The crucial difference between people with OCD and non-clinical individuals would be the presence of OCD-related dysfunctional beliefs. compulsions are aimed at undoing the intrusive thoughts.  With respect of core symptoms of Obsessive Compulsive Disorder(OCD) deficit in cognitive inhibition is probable. But results are inconsistent in this field. Here researchers are aimed to study the probable IOR deficit in clinical sample of compulsive washing . this study is a causal- comparative research.  Beck Depression Inventory - version II (BDI-II), Obsessional Beliefs Questionnaire- 44 (OBQ-44) and emotional Inhibition of Return test were administered of  47 clinical samples of compulsive washing. The results of MANOVA analysis showed that there is no differences between two groups in IOR (F_(4,42)=-0.578, P=0.735; Wilk’s Lambda= 0.955; Partial η²= 0.045). Moreover there is a significant deference between reaction times in valid and invalid trails  (t= 4.209; P≤0.01) that shows the general IOR phenomena in participants. This research failed to show  cognitive inhibition deficit  in clinical samples of compulsive washing according to their dysfunctional beliefs.IT seems that IOR deficient is not detectable in OCD patients according to exogenous attention. Other theoretical and experimental implications are discussed.