A refrigerator includes a main body having a storage compartment formed therein; a door formed with a handle on a first side thereof and rotatably disposed on the main body; a sensor disposed on the door and sensing whether or not a user is touching the sensor; and a rotational cam mechanism having a plurality of rotational cam units, each of the rotational cam units having a different rotational radius, installed in the main body and opening the door sequentially according to a sensing of the sensor.