To provide a baby bottle that can accurately sense the formula temperature and the lactation temperature of powdered milk with a thermometer attached to the baby bottle, and eliminates anxiety and worry about properness of the formula temperature and the lactation temperature when mixing the powdered milk in the baby bottle and nursing a baby.

The baby bottle with a thermometer, that is, the thermometer (4) being attached to the baby bottle (1), can sense the formula temperature and the lactation temperature.