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 comprises a door body , and a panel assembly detachably mounted to the door body and configured to define a front surface of the door ; wherein the door body comprises: a front plate , a door liner configured to define a rear surface of the door , and a cap decor connected to the door liner and to the front plate wherein a space is defined between the door liner , the front plate and the cap decor for an insulator to be filled therein; and wherein the panel assembly comprises: a panel configured to define the front surface of the door ; and an insertion protrusion protruding from the panel towards the door body and configured to be detachably inserted into a protrusion insertion hole , characterized in that the protrusion insertion hole is a protrusion insertion hole of a front surface of the cap decor for restricting the panel assembly when the panel is mounted to the door body , wherein the insertion protrusion when inserted into the front surface of the cap decor extends in forward-rearward direction and at least a part of the insertion protrusion is disposed below the recessed space , and the cap decor having a recessed space forming a handle for the door . a cabinet configured to define a storage space; and a door configured to open and close the storage space, wherein the door comprises a door body , and a panel assembly detachably mounted to the door body and configured to define a front surface of the door ; wherein the door body comprises: a front plate , a door liner configured to define a rear surface of the door , and a cap decor connected to the door liner and to the front plate wherein a space is defined between the door liner , the front plate and the cap decor for an insulator to be filled therein; and a front plate , a door liner configured to define a rear surface of the door , and a cap decor connected to the door liner and to the front plate wherein a space is defined between the door liner , the front plate and the cap decor for an insulator to be filled therein; and wherein the panel assembly comprises: a panel configured to define the front surface of the door ; and an insertion protrusion protruding from the panel towards the door body and configured to be detachably inserted into a protrusion insertion hole , characterized in that the protrusion insertion hole is a protrusion insertion hole of a front surface of the cap decor for restricting the panel assembly when the panel is mounted to the door body , wherein the insertion protrusion when inserted into the front surface of the cap decor extends in forward-rearward direction and at least a part of the insertion protrusion is disposed below the recessed space , and the cap decor having a recessed space forming a handle for the door . a panel configured to define the front surface of the door ; and an insertion protrusion protruding from the panel towards the door body and configured to be detachably inserted into a protrusion insertion hole , characterized in that the protrusion insertion hole is a protrusion insertion hole of a front surface of the cap decor for restricting the panel assembly when the panel is mounted to the door body , wherein the insertion protrusion when inserted into the front surface of the cap decor extends in forward-rearward direction and at least a part of the insertion protrusion is disposed below the recessed space , and the cap decor having a recessed space forming a handle for the door . <EOS>