A refrigerator comprising: a main body; a storage chamber having a front side that is open, and provided at an inside with a storage box that is movable in a front-rear direction; a door rotatably coupled to the main body to open and close the storage chamber, and provided at a rear surface with a pusher that protrudes in a direction toward the storage chamber; and an opening and closing device provided at one side of the storage box, and formed to allow the storage box to be moved in the front and rear direction according to the opening and closing of the door, wherein the opening and closing device includes: a case including a first case adjacent to a sidewall of the storage chamber, and a second case adjacent to the storage box; a first rack gear and a second rack gear accommodated in the case and configured to move in a front and rear direction according to the opening and closing of the door; a pinion gear configured to engage with the first rack gear and the second rack gear such that the first rack gear and the second rack gear move linearly in a same direction; a locking member rotatably coupled to the second rack gear to be locked with and released from the storage box, and configured to move in the front and rear direction together with the second rack gear; and a catcher accommodated in the case and configured to rotate to be caught with and released from the pusher according to the opening and closing of the door; an elastic member accommodated in the case, and comprising a first elastic member configured to transmit an elastic force to the second rack gear, and a second elastic member configured to transmit an elastic force to the catcher, wherein the first rack gear is configured to come in contact with the pusher, and the catcher is rotated to be caught with the pusher when the door is a closed state to push the first rack gear such that the first rack gear is moved backward. a main body; a storage chamber having a front side that is open, and provided at an inside with a storage box that is movable in a front-rear direction; a door rotatably coupled to the main body to open and close the storage chamber, and provided at a rear surface with a pusher that protrudes in a direction toward the storage chamber; and an opening and closing device provided at one side of the storage box, and formed to allow the storage box to be moved in the front and rear direction according to the opening and closing of the door, wherein the opening and closing device includes: a case including a first case adjacent to a sidewall of the storage chamber, and a second case adjacent to the storage box; a first rack gear and a second rack gear accommodated in the case and configured to move in a front and rear direction according to the opening and closing of the door; a pinion gear configured to engage with the first rack gear and the second rack gear such that the first rack gear and the second rack gear move linearly in a same direction; a locking member rotatably coupled to the second rack gear to be locked with and released from the storage box, and configured to move in the front and rear direction together with the second rack gear; and a catcher accommodated in the case and configured to rotate to be caught with and released from the pusher according to the opening and closing of the door; an elastic member accommodated in the case, and comprising a first elastic member configured to transmit an elastic force to the second rack gear, and a second elastic member configured to transmit an elastic force to the catcher, wherein the first rack gear is configured to come in contact with the pusher, and the catcher is rotated to be caught with the pusher when the door is a closed state to push the first rack gear such that the first rack gear is moved backward. a case including a first case adjacent to a sidewall of the storage chamber, and a second case adjacent to the storage box; a first rack gear and a second rack gear accommodated in the case and configured to move in a front and rear direction according to the opening and closing of the door; a pinion gear configured to engage with the first rack gear and the second rack gear such that the first rack gear and the second rack gear move linearly in a same direction; a locking member rotatably coupled to the second rack gear to be locked with and released from the storage box, and configured to move in the front and rear direction together with the second rack gear; and a catcher accommodated in the case and configured to rotate to be caught with and released from the pusher according to the opening and closing of the door; an elastic member accommodated in the case, and comprising a first elastic member configured to transmit an elastic force to the second rack gear, and a second elastic member configured to transmit an elastic force to the catcher, wherein the first rack gear is configured to come in contact with the pusher, and the catcher is rotated to be caught with the pusher when the door is a closed state to push the first rack gear such that the first rack gear is moved backward.