A refrigerator comprising: a cabinet defining a storage space; a door opening and closing the cabinet; an outer plate defining an outer appearance of the door and having an opening therethrough; and a transparent display assembly which covers an opening of the outer plate and through which an inner space of the refrigerator is seen, wherein the transparent display assembly comprises: a front panel defining a front surface of the door; a rear panel defining a rear surface of the door; an outer spacer provided between the front panel and the rear panel to provide a sealed space between the front panel and the rear panel; a display provided in the sealed space; a display cable configured to electrically connected to the display; a docking printed circuit board, PCB, provided on an upper portion of the door, the docking PCB being connected to the display cable, wherein the refrigerator further comprises: a control unit located at the cabinet and configured to control operation of the refrigerator; and a connection cable configured to connect the docking PCB to the control unit, wherein the transparent display assembly is configured to be selectively manipulated by the user in a transparent state, an opaque state or a display state, when the transparent display assembly is transparent state, an inside of the refrigerator is seen through the transparent display assembly, and when a manipulation is inputted while the transparent display assembly is opaque state, the control unit outputs a screen on the display by communication of the control unit with the transparent display assembly through the display cable and the connection cable, characterized in that a sealant is provided at a circumference of the outer spacer to seal a circumferential surface of the transparent display assembly, an insulation material is configured to come into contact with a circumference of the transparent display assembly to fix the transparent display assembly; the display cable includes a flexible flat cable that is bendable, the display cable passes through a gap between the outer spacer and the rear panel and passes through the sealant and extends along the circumferential surface of the transparent display assembly. wherein the transparent display assembly comprises: a front panel defining a front surface of the door; a rear panel defining a rear surface of the door; an outer spacer provided between the front panel and the rear panel to provide a sealed space between the front panel and the rear panel; a display provided in the sealed space; a display cable configured to electrically connected to the display; a docking printed circuit board, PCB, provided on an upper portion of the door, the docking PCB being connected to the display cable, a front panel defining a front surface of the door; a rear panel defining a rear surface of the door; an outer spacer provided between the front panel and the rear panel to provide a sealed space between the front panel and the rear panel; a display provided in the sealed space; a display cable configured to electrically connected to the display; a docking printed circuit board, PCB, provided on an upper portion of the door, the docking PCB being connected to the display cable, wherein the refrigerator further comprises: a control unit located at the cabinet and configured to control operation of the refrigerator; and a connection cable configured to connect the docking PCB to the control unit, a control unit located at the cabinet and configured to control operation of the refrigerator; and a connection cable configured to connect the docking PCB to the control unit, wherein the transparent display assembly is configured to be selectively manipulated by the user in a transparent state, an opaque state or a display state, when the transparent display assembly is transparent state, an inside of the refrigerator is seen through the transparent display assembly, and when a manipulation is inputted while the transparent display assembly is opaque state, the control unit outputs a screen on the display by communication of the control unit with the transparent display assembly through the display cable and the connection cable, characterized in that a sealant is provided at a circumference of the outer spacer to seal a circumferential surface of the transparent display assembly, an insulation material is configured to come into contact with a circumference of the transparent display assembly to fix the transparent display assembly; the display cable includes a flexible flat cable that is bendable, the display cable passes through a gap between the outer spacer and the rear panel and passes through the sealant and extends along the circumferential surface of the transparent display assembly.