A refrigerator comprise: a door including a body including: a outer plate, and a first and second cap coupled to the outer plate the first cap including an opening providing entry to a space in the first cap, a door panel detachably mountable on the body, and including: a panel, and a first and second trim, and a fixer on the first cap and rotatable between unlocked and locked positions. The body, the door panel, and the fixer configured so that, to mount the door panel on the body: the second trim is coupled to the second cap and the fixer is in the unlocked position, the first trim is passed through the opening into the space and, while being inserted into the space, the first trim presses, thereby rotating, the fixer to the locked position, so that the fixer is coupled to the first trim.