We describe a case of collodion baby diagnosed prenatally by ultrasound. Classic signs (ectropion, flattened nose, and eclabion) were detected on routine ultrasound at 21 weeks of gestation. At birth, the presence of collodion membrane was confirmed and subsequently, the diagnosis of an autosomal recessive congenital ichthyosis due to compound heterozygosity of the TGM1 gene was made.