There is disclosed a refrigerator including a case having a storage chamber provided therein; a lighting device provided in the storage chamber to light an inner space of the storage chamber, a first door rotatably coupled to the case to open and close the storage chamber, an auxiliary storage chamber (50) provided in the first door to define a storage space, the auxiliary storage chamber (50) accessible through an opening formed in the first door, a second door (30) rotatably coupled to the first door in the same direction as the first door, a
front panel attached to a front surface of the second door (30), the
front panel formed of a transparent material, an
evaporation treatment unit evaporated on an overall back surface of the
front panel to transmit lights partially, a variable transparency film (120) attached to a back surface of the
evaporation treatment unit provided in the front panel to get transparent when the power is supplied, a frame unit of the second door (30) on which the front panel is mounted, with an opening having a corresponding size to an opening provided in the first door, an insulation panel provided in the frame unit of the second door (30), distant from the front panel, a
power supply unit for supplying an
electric power to the variable transparency film (120) and the lighting device, a
proximity sensor provided in the second door (30) to sense a user's approaching, and a
control unit for controlling the
power supply unit to simultaneously operate the variable transparency film (120) and the lighting device based on a sensing
signal of the
proximity sensor.