PROBLEM TO BE SOLVED: To provide an artificial nipple capable of adjusting a feeding time and a flow rate of a beverage appropriate for an infant by a simple method, and a feeding device for shaking the artificial nipple.SOLUTION: An artificial nipple 2 includes an artificial nipple body 7, a first ventilation member 5 having a plurality of ventilation holes 53, 54 and 55 with aperture areas that differ from each other under the same differential pressure, and a second ventilation member 6 having a ventilation hole 67, and is attached to a feeding device body in which a beverage is accommodated. The ventilation hole 67 of the second ventilation member 6 is caused to be selectively communicated with a plurality of the ventilation holes 53, 54 and 55 of the first ventilation member 5 to adjust a flow rate of gas that flows in from outside the feeding device 1 through the ventilation holes that have been communicated.COPYRIGHT: (C)2014,JPO&INPIT【課題】乳幼児にとって適切な授乳時間又は飲料の流量を簡便な方法で調整することができる人工乳首及び人工乳首を揺する哺乳器を提供する。【解決手段】人工乳首2は、人工乳首本体7と、同一差圧下において互いに異なる開口面積を備えた複数の通気孔53、54、55を有する第1通気部材5と、通気孔67を有する第2通気部材6と、を具備し、飲料が収容される哺乳器本体に対して取り付けられる人工乳首2であって、第1通気部材5の複数の通気孔53、54、55に対して第2通気部材6の通気孔67を選択的に連通させることによって、該連通した通気孔を介して哺乳器1の外から中に流入する気体の流量を調整する。【選択図】図2