The selective serotonin reuptake inhibitor of sertraline is frequently used for many psychiatric disorders, led by depression in children and adolescents. Effects of this medication, with relatively low side effect profile, on the urinary system are very rare with a low number of case reports in the literature. In this case report, a thirteen-year old patient using sertraline for obsessive compulsive disorder who developed urinary incontinence due to this medication is explained.