Fifty-three patients were evaluated by ultrasonographic visualization of the sublingual space as part of routine neck sonography. Delineation of the sublingual gland was good or fair in 93% of the cases. The normal gland was 32.06 mm long in the sagittal plane. The submandibular duct was identified in 53% of the cases and measured less than 2.5 mm in diameter. The sublingual vessels were detected in 93% of the cases and had almost the same mean diameter as the duct. Four cases of frequent pathologies in this region were also examined. Ultrasonography is the examination to use for diseases of the sublingual space.