Inclusion Criteria:  individual meeting ICD-10 criteria for diagnosis of specific phobia fluent in Czech  Exclusion Criteria:  currently receiving psychological treatment for acrophobia psychotropic medication (unless on stable dosage for the previous 1 month and stabilized for the duration of the study) another severe mental disorder, such as bipolar disorder or psychotic disorder contradictions to using a virtual reality (e.g., epilepsy, balance problems)