There were three aims of the study: to determine psychometric properties of Serbian translation of Beck's Cognition Check List, to analyze factor structure of both subscales of Check List and to check the relationship among determined dimensions of the subscales. Patients with depressive anxiety and mixed diagnoses participated. Results suggest that subscale of depressive cognitions is of satisfactory reliability and both concurrent and divergent validity. Subscale of anxious cognitions has satisfactory internal consistency, but is weakly correlated with anxiety symptoms and is not discriminatively valid. Principal components analysis of depressive cognitions subscale yielded three factors that corresponded to the elements of Beck's "Negative Cognitive Triad". Analysis of anxious subscale did not provided dimensions hypothesized by Beck, but three dimensions, which correspond to three groups of anxious symptoms, where identified. Results indicate possibility of applying Beck’s Content Specificity Hypothesis on separation of specific anxiety or phobic disorders.