Provided is a liquid storing body for preventing a liquid containing a sedimentous component with a predetermined concentration or more from being supplied to a liquid jetting apparatus. An ink tank 1 (liquid storing body) is provided with an ink storing part 4 in which an opening provided on a side surface of a case 2 is sealed with a film 3. An ink injection port 9 is formed in an upper portion wall 2b of the case 2, and a plug member 20 is mounted therein. The plug member 20 is provided with a sealing part 30 that can seal the ink injection port 9, an operation part 40 that is inserted in an ink reservoir chamber 11 via the ink injection port 9, and a stirring portion 50 provided at the lower end of the operation part 40. Ink in the ink storing part 4 can be stirred by a user moving the plug member 20 up and down with their hand.