A refrigerator comprising: a cabinet configured to define a storage space; and a door configured to open and close the storage space, wherein the door includes: a door liner configured to define a rear surface of the door; a front plate disposed to be spaced forward from the door liner; an upper cap décor which is coupled to the door liner and an upper end of the front plate to define a top surface of the door and in which a recessed handle is defined; a lower cap décor coupled to the door liner and a lower end of the front plate to define a bottom surface of the door; and an insulator filled into a space defined by coupling the door liner, the front plate, and the cap decors (142,144); characterized in that the refrigerator further comprises: a panel assembly disposed detachably in front of the front plate, wherein the panel assembly includes: a panel configured to define an outer appearance of the front surface of the door; an upper bracket provided along an upper portion of a rear surface of the panel facing the upper cap décor and inserted into and coupled to the upper cap décor; and a lower bracket provided along a lower portion of the rear surface of the panel facing the lower cap décor and restricted by the lower cap décor, wherein a restriction protrusion is disposed on the lower bracket and configured to restrict the lower end of the panel assembly, an accommodation space is defined in the lower cap décor, and a locking member is rotatably mounted in the accommodation space, the restriction protrusion is inserted into a front opening of the lower cap decor to be coupled to the locking member. a cabinet configured to define a storage space; and a door configured to open and close the storage space, wherein the door includes: a door liner configured to define a rear surface of the door; a front plate disposed to be spaced forward from the door liner; an upper cap décor which is coupled to the door liner and an upper end of the front plate to define a top surface of the door and in which a recessed handle is defined; a lower cap décor coupled to the door liner and a lower end of the front plate to define a bottom surface of the door; and an insulator filled into a space defined by coupling the door liner, the front plate, and the cap decors (142,144); a door liner configured to define a rear surface of the door; a front plate disposed to be spaced forward from the door liner; an upper cap décor which is coupled to the door liner and an upper end of the front plate to define a top surface of the door and in which a recessed handle is defined; a lower cap décor coupled to the door liner and a lower end of the front plate to define a bottom surface of the door; and an insulator filled into a space defined by coupling the door liner, the front plate, and the cap decors (142,144); characterized in that the refrigerator further comprises: a panel assembly disposed detachably in front of the front plate, wherein the panel assembly includes: a panel configured to define an outer appearance of the front surface of the door; an upper bracket provided along an upper portion of a rear surface of the panel facing the upper cap décor and inserted into and coupled to the upper cap décor; and a lower bracket provided along a lower portion of the rear surface of the panel facing the lower cap décor and restricted by the lower cap décor, wherein a restriction protrusion is disposed on the lower bracket and configured to restrict the lower end of the panel assembly, an accommodation space is defined in the lower cap décor, and a locking member is rotatably mounted in the accommodation space, the restriction protrusion is inserted into a front opening of the lower cap decor to be coupled to the locking member. a panel assembly disposed detachably in front of the front plate, wherein the panel assembly includes: a panel configured to define an outer appearance of the front surface of the door; an upper bracket provided along an upper portion of a rear surface of the panel facing the upper cap décor and inserted into and coupled to the upper cap décor; and a lower bracket provided along a lower portion of the rear surface of the panel facing the lower cap décor and restricted by the lower cap décor, a panel configured to define an outer appearance of the front surface of the door; an upper bracket provided along an upper portion of a rear surface of the panel facing the upper cap décor and inserted into and coupled to the upper cap décor; and a lower bracket provided along a lower portion of the rear surface of the panel facing the lower cap décor and restricted by the lower cap décor, wherein a restriction protrusion is disposed on the lower bracket and configured to restrict the lower end of the panel assembly, an accommodation space is defined in the lower cap décor, and a locking member is rotatably mounted in the accommodation space, the restriction protrusion is inserted into a front opening of the lower cap decor to be coupled to the locking member.