Bochdalek hernias are a rare diaphragmatic hernia, usually diagnosed in childhood. We report a case of a large Bochdalek hernia containing omentum, stomach, left colon and some small bowel (jejunum) including mesentery, the superior pole of the left kidney, spleen and tail of pancreas diagnosed in adulthood. Our patient underwent a laparoscopic repair of this massive hernia with a composite mesh with an excellent post-operative outcome.