To provide a tubular cap for feeding bottles which prevent air from spilling into the bellies of babies.

A ring type neck part which is mounted at the upper part of the feeding bottle and kept a little higher at a part hollow inside is moved inside the mouth of the feeding bottle to fix a nipple being pinched with the cap of the feeding bottle. A deep ring-shaped hollowness is made extending downward to the bottom between outer and inner walls of the neck part and several air admission holes 331 opened downward are arrayed in a ring on the bottom surface part of the hollowness. The air outside the feeding bottle introduced from an air admission valve on the bottom part of the nipple is guided to the air admission hole 331 slightly away from the mouth of the bottle through the hollowness extended downward. The refilling of air is automatically performed preferentially from the low-pressure air admission hole to avoid a zone for discharging the liquid left in the passage thereof within the feeding bottle.