en General پژوهشي Research Article <div style="text-align: justify;"><span style="font-size:14px;"><span style="font-family:Times New Roman;"><strong>Background:</strong> The COVID-19 pandemic has aroused fear and anxiety in many people worldwide.<strong><br> Objectives:</strong> The study was conducted to measure the efficacy of internet-based cognitive-behavioral therapy (ICBT) for mental health, post-traumatic stress disorder (PTSD), and obsessive-compulsive disorder (OCD) in students with COVID-19 anxiety.<br> <strong>Methods: </strong>This semi-experimental study was conducted as a pre-post-test with a control group. The statistical population of the research included the students of the Tarbiat Modares University in the academic year 2021. To collect the required data, 30 students with COVID-19 anxiety were randomly allocated to control (n = 30) and experimental (n = 30) groups. The data collection tools included a questionnaire on COVID-19 anxiety, mental health, PTSD, and OCD. Following the pre-test, ICBT was implemented in eight 90-minute sessions for the experimental group. To analyze the data, SPSS software version 24 and the multivariate covariance analysis were used.<br> <strong>Results:</strong> It was revealed that ICBT could significantly increase mental health (M = 54.26, F = 33.38) and reduce PTSD (M = 67.20, F = 30.43) and OCD (M = 116.13, F = 19.11) in students with COVID-19 anxiety (P < 0.01).<br> <strong>Conclusions:</strong> In general, it can be acknowledged that ICBT has promoted mental health and reduced PTSD and OCD. Accordingly, it is suggested to hold workshops and virtual programs by psychologists for students with COVID-19 anxiety.</span></span></div> Internet-based Cognitive Behavioral Therapy,Mental Health,Post-traumatic Stress Disorder,Obsessive-Compulsive Disorder,COVID-19 Anxiety 0 0 http://mcj.bums.ac.ir/browse.php?a_code=A-10-1-243&slc_lang=en&sid=1 Farzin Bagheri Sheykhangafshe farzinbagheri73@gmail.com 10031947532846005169 10031947532846005169 Yes Faculty of Humanities, Tarbiat Modares University, Tehran, Iran Ali Fathi-Ashtiani 10031947532846005170 10031947532846005170 No Behavioral Sciences Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran Vahid Savabi Niri 10031947532846005171 10031947532846005171 No Ardabil Branch, Islamic Azad University, Ardabil, Iran Mahlagha Jahani Zangir 10031947532846005172 10031947532846005172 No Payam Noor University of Ardabil Branch, Ardabil, Iran Zeynab Bourbour 10031947532846005173 10031947532846005173 No Garmsar Branch, Islamic Azad University, Semnan, Iran