A refrigerator comprising: a cabinet; a freezing compartment defined in the cabinet; a door coupled to the cabinet so as to open and close the freezing compartment; a shelf guide provided on an inner surface of the freezing compartment; a support plate supported by the shelf guide; an evaporator, disposed throughout the freezing compartment and constituted by a refrigerant pipe supported by the support plate; and a shelf mounted on the support plate; wherein there is a pressure regulator, which is mounted at a predetermined position on the cabinet so as to allow an inside of the freezing compartment to communicate with an outside of the freezing compartment to reduce a difference in pressure upon opening the door, wherein the pressure regulator comprises: a connecting tube mounted at the predetermined position on the cabinet; and a heater disposed around the connecting tube so as to heat the connecting tube to thus eliminate frost generated on an inner surface of the connecting tube, wherein the support plate comprises: lateral side supports, which extend downward from both lateral side edges of the support plate to surround the evaporator refrigerant pipe and which are supported by the shelf guide, and a plurality of support holders, which extend downward from a lower surface of the support plate to support the evaporator refrigerant pipe. a cabinet; a freezing compartment defined in the cabinet; a door coupled to the cabinet so as to open and close the freezing compartment; a shelf guide provided on an inner surface of the freezing compartment; a support plate supported by the shelf guide; an evaporator, disposed throughout the freezing compartment and constituted by a refrigerant pipe supported by the support plate; and a shelf mounted on the support plate; wherein there is a pressure regulator, which is mounted at a predetermined position on the cabinet so as to allow an inside of the freezing compartment to communicate with an outside of the freezing compartment to reduce a difference in pressure upon opening the door, wherein the pressure regulator comprises: a connecting tube mounted at the predetermined position on the cabinet; and a heater disposed around the connecting tube so as to heat the connecting tube to thus eliminate frost generated on an inner surface of the connecting tube, wherein the support plate comprises: lateral side supports, which extend downward from both lateral side edges of the support plate to surround the evaporator refrigerant pipe and which are supported by the shelf guide, and a plurality of support holders, which extend downward from a lower surface of the support plate to support the evaporator refrigerant pipe. a connecting tube mounted at the predetermined position on the cabinet; and a heater disposed around the connecting tube so as to heat the connecting tube to thus eliminate frost generated on an inner surface of the connecting tube, wherein the support plate comprises: lateral side supports, which extend downward from both lateral side edges of the support plate to surround the evaporator refrigerant pipe and which are supported by the shelf guide, and a plurality of support holders, which extend downward from a lower surface of the support plate to support the evaporator refrigerant pipe. lateral side supports, which extend downward from both lateral side edges of the support plate to surround the evaporator refrigerant pipe and which are supported by the shelf guide, and a plurality of support holders, which extend downward from a lower surface of the support plate to support the evaporator refrigerant pipe.