PROBLEM TO BE SOLVED: To provide an artificial nipple and a breast milk feeding receptacle capable of preventing leakage of liquid in the receptacle and relieving negative pressure in the receptacle smoothly even when the artificial nipple is made of a material with low hardness.SOLUTION: The artificial nipple 100 comprises a nipple body 101 and a seat section 102. The nipple body has an outlet section 130 for discharging liquid from the receptacle 11 to the oral cavity of a user and a wall surface 110 that abuts the tongue of the user. The seat section is formed circumferentially on the lower side of the nipple body and is fixed to the receptacle by an adapter section 12. The artificial nipple is made of the elastic material having a hardness of 5-30. The seat section has a plurality of penetrating holes 103a having diameters of 0.1-0.2 mm.COPYRIGHT: (C)2006,JPO&NCIPI【課題】硬度の低い材質で成る人工乳首であっても、容器内の液体が漏れ出すことなく、容器内の負圧を円滑に解消できる人工乳首及び哺乳器を提供すること。【解決手段】使用者の口腔内に容器11内の液体を流出させるための流出口部130と、使用者の舌が当接する壁面110と、を有する乳首本体101と、乳首本体の下方側で円周状に形成されると共に、容器に対してアダプタ部12により固定される座板部102と、を備え、人工乳首は、硬度5度乃至30度の弾性材料から成っており、座板部には、複数の貫通孔103aが形成され、貫通孔の孔径が0.1mm乃至0.2mmで形成されている人工乳首100。【選択図】図3