Gangliosidosis GM1, is a lipid storage disorder due to deficiency of the lysosomal enzyme &beta-galactosidase. This deficiency leads to lysosomal accumulation of gangliosidosis GM1 to be, which contributes to swelling, cell damage and dysfunction of the organs. Gangliosidosis GM1a rare neurodegenerative disorder. Mongolian spots are significant clinical sign in some of the metabolic diseases, such as gangliosidosis GM1, but limited information is available. Hepatomegaly, hypotonia, edema, seizures, and skeletal malformations and Cherry red spot in the macula of the eye are of other symptoms of the disease. In this paper, we present a 10-month-old child with gangliosidosis GM1 type 1 with extensive mongolian spots who was referred the Hajar Medical Educational Therapeutic Center Shahrekord.