A vacuum-sealed container wherein a large negative pressure is applied inside the container without using a pump, making it possible to store food for a long time; the container can be sealed without using a packing. The vacuum-sealed container includes: a container body having a lid coupling groove formed along the periphery of the upper end portion of an opening and arranged along a closed path; a lid body formed to be convex upward using an elastic material, the lid body having a sealing portion formed thereon such that the same is inserted into the lid coupling groove along the periphery thereof so as to seal the inside of the container body; and a valve installed on the lid body so as to provide a passage, through which air inside the container body is discharged to the outside, and so as to expose/cover the passage.