Yes, although the seeds are small and usually the size of a mustard seed.
Bananas grow from an enlarged stem (pseudostem) that develops opposite one leaf on each side of the original banana plant's central trunk. The pseudostem is so enlarged by environmental factors, it may become rather long in length with tapering ends for up to 9-10 feet or more if left un-pruned at both ends before bearing fruit. The flesh inside the pseudostems is very thin and has no further role in pedestrian fruit production. This type of stem structure is called reduced vegetative growth because all of its tissue goes into producing just one kind of organ, not two kinds like leaves or roots...