Recent reports reveal CNTN6 as a candidate susceptibility gene of autism spectrum disorder (ASD) (Doan et al., 2016; Hu et al., 2015; Iossifov et al., 2014; Kashevarova et al., 2014; Mercati et al., 2017; Poot, 2014; Schmitz‐Abe et al., 2020; van Daalen et al., 2011), a spectrum disorder in which social impairment and repetitive behavior are the core symptoms. Here, CNTN6 is linked to autism spectrum disorder.