The hydrocele of the canal of Nuck is quite a rare condition and results from the failure of obliteration of the distal portion of evaginated parietal peritoneum within the inguinal canal which forms a sac containing fluid. It generally presents with painless inguinal swelling. Ultrasonography plays an important role to differentiate from the other conditions presenting with inguinal swelling. We present the case of 40 year female with hydrocele of canal of nuck.