To provide a nursing bottle reducing suction of air causing burps, stomachache and indigestion of a baby when a person feeding milk feeds milk to the baby by using the nursing bottle.

A nursing bottle body is produced by silicone 1 with a thickness suitable for holding by hand, and thin silicone 2 contracted by the atmospheric pressure in accordance with drinking. Before usage, the nursing bottle is erected and all air inside is released from a nipple. As a result, in the nursing bottle, there is no air inflow to a nipple portion and the baby can comfortably drink milk or liquid food to the last in various positions without sucking air. It has an effect of reducing suction of air similarly to breast milk, and the baby can sleep safely without forcibly burping the baby. Further, stomachache and indigestion can be prevented. Since the nursing bottle can be used by the same suction force by the atmospheric pressure even when it is erected, it is convenient and revolutionary.