A 4-month-old infant presented with asymptomatic soft nodules on his right forearm, which had developed since birth and grown gradually. On the suspicion of nevus lipomatosus superficialis, biopsy was performed. Histopathologic findings showed monomorphic polygonal cells with abundant granular cytoplasm. Immunohistochemical stains for CD68 and vimentin were strongly positive, but were negative for S-100 protein. Based on the pathologic findings, the patient was finally diagnosed as non-neural granular cell tumor. Granular cell tumor (GCT) is benign, indolent and slow growing tumor which can be divided into conventional and non-neural GCT by immunoreactivity for S-100 protein. Non-neural granular cell tumor (NN-GCT) is typically manifested as a well-circumscribed, papulo-nodular dermal mass, and is known to occur in a younger group than does in conventional GCT, but is rare among children. To our knowledge, there have been no case reports of NN-GCT which appeared at birth and presented as grouped nodules as seen in this case. Therefore, we herein report this interesting case of congenital NN-GCT clinically mimicking NLS.