Here, we reported a 10-year-old girl with severe intellectual disability, rigidity, ataxia or dyspraxia, and cerebellar atrophy on brain MRI; two <i>BRAT1</i> variants in the <i>trans</i> configuration [c.1014A > C (p.Pro338 = ); c.706delC (p.Leu236Cysfs*5)] were detected using whole-exome sequencing. This evidence concerns the gene BRAT1 and cerebellar ataxia.