The present invention relates to a sterilizing apparatus using hydrogen peroxide, which aims at maximizing sterilization efficiency by supplying hydrogen peroxide to a preheated sterilization chamber in a liquid state after preheating the inside of the sterilization chamber, will be. To this end, the hydrogen peroxide sterilization apparatus according to the present invention comprises: A sterilization chamber 210 in which a sterilization chamber 210 is formed so that an object to be sterilized can be inserted therein, and a sterilization chamber 200 in which an open front face can be opened and closed through a chamber door 110； A blowing fan 320 partitioned at a rear portion of the sterilizing chamber 210 for blowing air in the sterilizing chamber 210 forcibly when the temperature of the sterilizing chamber 210 is raised and a blowing fan 320 for blowing air blown by the blowing fan 320 A heating chamber 300 in which an air heater 330 for heating is accommodated； The heat generated in the heating chamber 300 in the heating mode is dispersed to the front of the bottom of the sterilization chamber 210 and to the right and left of the sterilization chamber 210 in a longitudinal direction on the bottom of the sterilization chamber 210, A hot air duct 400 for blowing air； A vacuum pump 500 connected to the sterilization chamber 200 through a vacuum air line 510 provided with a first solenoid valve 520 to provide vacuum pressure to the sterilization chamber 200 in the vacuum mode； A hydrogen peroxide evaporation unit 600 provided in the hot air duct 400 for sterilizing the sterilized object by evaporating hydrogen peroxide in the sterilization chamber 210 in the sterilization mode； A hydrogen peroxide solution supply unit 700 connected to the hydrogen peroxide evaporation unit 600 through a hydrogen peroxide supply line 720 provided with a second solenoid valve 710 for supplying liquid hydrogen peroxide to the hydrogen peroxide evaporation unit 600 in a vacuum mode, )of
