A breast milk sterilizing apparatus provided with a nursing bottle holding breast milk, a holder cylinder body of metal having a cylindrical wall portion to which the nursing bottle is inserted, a heater and a heater temperature sensor wound around a periphery of the cylindrical wall portion, a breast milk temperature sensor to measure breast milk temperature on a bottom face of the nursing bottle, and a breast milk temperature controlling portion to control the heater based on a breast milk temperature measured value measured by the breast milk temperature sensor.
