Refrigerator and door opening and closing device

A door opening and closing device for opening and closing a door comprising:

• a driver that generates power;
• a power transmission portion that transmits the power of the driver;
• an operating portion that receives the power of the driver and operates to open the door;
• a first operating portion that operates by receiving power from the driver;
• and
• a second operating portion configured to operate by receiving power from the driver and having a link connected to the door,
• wherein the power transmission portion includes:
• an input gear assembly, and an output gear assembly to receive power from the input gear assembly and transmit the power to the second operating portion,
• wherein the input gear assembly includes:
• a shaft,
• a first input gear connected to the shaft, and
• a second input gear located at an initial position when the driver is in a stopped state, and configured to move to be connected to the output gear assembly when the driver is operated, and
• wherein the input gear assembly is configured to transmit power to the output gear assembly in a direction crossing an axial direction of the shaft.