To provide an artificial nipple with a breast-feeding state close to child-care with breast milk.

The artificial nipple 1 for a baby bottle includes: a hollow distal end part 10 arranged at the distal end of the artificial nipple 1; a body part 20 arranged at the side opposite to the distal end part 10; a separating membrane part 30 arranged between the distal end part 10 and the body part 20; and a valve 31 arranged in the separating membrane part 30. The separating membrane part 30 includes a bending part 32 to be projected toward the body part 20 from the separating membrane part 30. The valve 31 is arranged in the bending part 32.