The present invention relates to a nursing bottle, capable of preventing stomach ache by preventing air from being inhaled into the stomach of a baby during bottle feeding. To this end, the present invention comprises: a main body (24) coupled to the body (10) of a nursing bottle by means of a coupling ring (30), a flange (21) connected to a lower portion of the main body (24), and a nipple (26) which is mounted on top of the main body (24) and has a dispensing hole (27) at the tip for dispensing milk, wherein the nipple (26) includes a plurality of protrusions (26a) projected from the inner peripheral surface at regular intervals to enable the expansion and contraction of the nipple in multiple stages the flange (21) includes through holes (22) symmetrically formed on both sides to allow the outside air to pass therethrough a delicate part (25) made of a flexible material is provided between the main body (24) and the nipple (26), the delicate part (25) having a thickness (d) smaller than the thickness (D) of the main body (24) and the nipple and a guide groove (23) formed in the top surface of the flange (21), creating a predetermined gap with the coupling ring (30) in order to guide the inflow of the outside air around the through holes (22).La présente invention concerne un biberon, permettant de prévenir les douleurs gastriques en empêchant lingestion dair dans lestomac dun bébé au cours de lallaitement. Pour parvenir à cet objectif, le biberon de la présente invention comprend un corps principal (24) couplé au corps (10) dun biberon au moyen dune bague de couplage (30), un rebord (21) connecté à une partie inférieure du corps principal (24), et une tétine (26) qui est montée sur le dessus du corps principal (24) et a un orifice de distribution (27) au niveau de son extrémité pour distribuer le lait, la tétine (26) comprenant une pluralité de protubérances (26a) se projetant depuis la surface périphérique interne à des intervalles réguliers pour permettre la di
