The organs that release digestive juices into the small intestine are:

* Pancreas: The pancreas secretes pancreatic juice containing digestive enzymes like amylase, lipase, and protease.

* Liver: The liver produces bile, which is stored in the gallbladder and then released into the small intestine. Bile aids in the digestion of fats.

So, there isn't one single organ, but rather two major organs contribute to releasing digestive juices into the small intestine.