An automatic closing apparatus for a sliding apparatus comprising a fixed rail fastened to a main body, a movable rail slidably installed on the fixed rail so that a container is opened or closed, and the automatic closing apparatus provided on a predetermined portion of the fixed rail, the automatic closing apparatus comprising: a body provided on the predetermined portion of the fixed rail, with an actuating space formed in the body to be open on upper and lower ends thereof, the body comprising: a guide wall provided in the actuating space, the guide wall including a curved guide part and a linear guide part; and a receiving space formed adjacent to the curved guide part; a slider configured to be locked to or unlocked from a locking member of the movable rail, the slider sliding in an open or close direction under guide of the guide wall; a hollow housing coupled to a predetermined portion of the body; a damping unit installed in the housing; and an elastic body fastened at a first end thereof to the housing and fastened at a second end thereof to the slider characterised in that the damping unit comprises: a damper inserted into the housing rearward and provided so as to slidable within a predetermined range in the housing, the damper having therein a hollow receiving space having a predetermined size; and a damping member comprising: a shock absorption part provided in the damper so as to be slidable in a longitudinal direction of the damper; and a damper rod fastened at an end thereof to the shock absorption part and extending in the longitudinal direction, the damper rod being configured such that as the shock absorption part slides, the damper rod is extended from and retracted into the damper, wherein during a process of closing the container, when an outer surface of a rear end of the damper comes into contact with an inner surface of a rear end of the housing, the damping unit begins to absorb shock so that the container is slowly moved in a close direction by restoring force of the elastic body. a body provided on the predetermined portion of the fixed rail, with an actuating space formed in the body to be open on upper and lower ends thereof, the body comprising: a guide wall provided in the actuating space, the guide wall including a curved guide part and a linear guide part; and a receiving space formed adjacent to the curved guide part; a guide wall provided in the actuating space, the guide wall including a curved guide part and a linear guide part; and a receiving space formed adjacent to the curved guide part; a slider configured to be locked to or unlocked from a locking member of the movable rail, the slider sliding in an open or close direction under guide of the guide wall; a hollow housing coupled to a predetermined portion of the body; a damping unit installed in the housing; and an elastic body fastened at a first end thereof to the housing and fastened at a second end thereof to the slider characterised in that the damping unit comprises: a damper inserted into the housing rearward and provided so as to slidable within a predetermined range in the housing, the damper having therein a hollow receiving space having a predetermined size; and a damping member comprising: a shock absorption part provided in the damper so as to be slidable in a longitudinal direction of the damper; and a damper rod fastened at an end thereof to the shock absorption part and extending in the longitudinal direction, the damper rod being configured such that as the shock absorption part slides, the damper rod is extended from and retracted into the damper, a damper inserted into the housing rearward and provided so as to slidable within a predetermined range in the housing, the damper having therein a hollow receiving space having a predetermined size; and a damping member comprising: a shock absorption part provided in the damper so as to be slidable in a longitudinal direction of the damper; and a damper rod fastened at an end thereof to the shock absorption part and extending in the longitudinal direction, the damper rod being configured such that as the shock absorption part slides, the damper rod is extended from and retracted into the damper, a shock absorption part provided in the damper so as to be slidable in a longitudinal direction of the damper; and a damper rod fastened at an end thereof to the shock absorption part and extending in the longitudinal direction, the damper rod being configured such that as the shock absorption part slides, the damper rod is extended from and retracted into the damper, wherein during a process of closing the container, when an outer surface of a rear end of the damper comes into contact with an inner surface of a rear end of the housing, the damping unit begins to absorb shock so that the container is slowly moved in a close direction by restoring force of the elastic body.