A refrigerator comprising: a cooler and a heating device; the heating device comprising: a heating chamber having a heating space that contains an object to be heated; an oscillation electrode disposed on one hand of the heating space and having an electrode surface; a counter electrode disposed on the other hand of the heating space and having an electrode surface that faces the electrode surface of the oscillation electrode; a high-frequency electric field forming unit for forming a high-frequency electric field applied to between the oscillation electrode and the counter electrode; and an inner surface member that defines an inner surface of the heating chamber; characterized in that the refrigerator further comprises an air passage through which a cold air produced by the cooler can flow, an electric field concentration region is formed on the electrode surface of the oscillation electrode, the oscillation electrode includes an opening portion formed in the electrode surface, the inner surface member includes a cold air introduction hole through which the cold air can be introduced from the air passage to the heating chamber, the location of the opening portion of the oscillation electrode corresponds to the location of the cold air introduction hole of the inner surface member, the electric field concentration region of the oscillation electrode is an edge part of the opening portion formed in the electrode surface, and an electric field concentration region is formed on the electrode surface of the counter electrode, with the electric field concentration region of the counter electrode being arranged so as not to face the electric field concentration region of the oscillation electrode. a heating chamber having a heating space that contains an object to be heated; an oscillation electrode disposed on one hand of the heating space and having an electrode surface; a counter electrode disposed on the other hand of the heating space and having an electrode surface that faces the electrode surface of the oscillation electrode; a high-frequency electric field forming unit for forming a high-frequency electric field applied to between the oscillation electrode and the counter electrode; and an inner surface member that defines an inner surface of the heating chamber; characterized in that the refrigerator further comprises an air passage through which a cold air produced by the cooler can flow, an electric field concentration region is formed on the electrode surface of the oscillation electrode, the oscillation electrode includes an opening portion formed in the electrode surface, the inner surface member includes a cold air introduction hole through which the cold air can be introduced from the air passage to the heating chamber, the location of the opening portion of the oscillation electrode corresponds to the location of the cold air introduction hole of the inner surface member, the electric field concentration region of the oscillation electrode is an edge part of the opening portion formed in the electrode surface, and an electric field concentration region is formed on the electrode surface of the counter electrode, with the electric field concentration region of the counter electrode being arranged so as not to face the electric field concentration region of the oscillation electrode.