Immigrant children seem to be more vulnerable for selective mutism (SM). Cultural adaptation is discussed as one important factor in the development of SM. This study focused differences in the cultural adaptation of parents of children with and without SM. Additionally, the association between parental cultural adaptation and speaking behavior of children was examined. Speaking behavior in different social situations and parental cultural adaptation were assessed in 48 immigrant children (22 mute, 26 controls). Significant correlations were found between the cultural adaptation of parents and speaking behavior of children in daycare facilities. Results indicate differential associations between cultural factors and speaking behavior of the children.