Cognitive behavioral therapy, consisting of exposure and response prevention and cognitive restructring, is still one of the most effective treatments for obsessive compulsive disorder. However, some patients do not fully benefit from the treatment. This condition results in more search for novel approaches that can contribute to effectiveness of standard treatments. In this regard, the use of technology-based methods in recent researches is noteworthy. Cognitive bias modification is one of these current efforts of technology-based methods. Cognitive bias modification involves computerized tasks designed to modify some cognitive biases such as attention and interpretation associated with psychopathology, particularly anxiety disorders. Researches have generally demonstrated that cognitive bias modification can be effective way to alter cognitive biases and to reduce anxiety symptoms. In recent years, there have been also some studies to investigate the potential effects of cognitive bias modification for obsessive compulsive disorder. Although more researches with larger clinical samples are warranted, there is emerging evidence for efficacy of cognitive bias modification for obsessive compulsive disorder as well. Beside, some studies suggest that cognitive bias modification can be used as a supplementary technique to standart cognitive behavioral therapy for obsessive compulsive disorder. Accordingly, the aim of this article is to review the limited number of empirical studies, particularly focusing on the effects of cognitive bias modification on obsessive compulsive symptoms and mechanisms of action underlying these effects.