A vacuum container for curing a tyre, comprising: an upper plate fixing a side surface of a green tyre and controlling entry and exit of air in an upward direction of the vacuum container; an outer ring surrounding a side surface of the upper plate and controlling entry and exit of the air in the upward and lateral directions of the vacuum container according to a vertical movement of the outer ring with respect to the upper plate; a segment slidably coupled to the outer ring, moving toward a tread of the green tyre when the outer ring moves downward, and moving away from the tread of the green tyre when the outer ring moves upward; and a lower plate having a vacuum suction hole for discharging the air downward and slidably supporting the segment, wherein, when the outer ring moves downward and the outer ring contacts the upper plate and the lower plate, the entry and exit of the air in the upward and lateral directions of the vacuum container are blocked, and wherein an air suction path is formed only at the vacuum suction hole formed at a position different from a position of a tread mold contacting a tyre tread, and/or wherein the upper plate comprises an upper discharge hole formed overlapping the segment in a vertical direction and the segment comprises a guide block that is slidably insertion-coupled to the upper discharge hole and moves together when the outer ring moves upward and the segment moves away from the tread, thereby allowing an air flow in the upward direction through the upper discharge hole, and moves together when the outer ring moves downward and the segment moves toward the tread, thereby blocking the air flow through the upper discharge hole. an upper plate fixing a side surface of a green tyre and controlling entry and exit of air in an upward direction of the vacuum container; an outer ring surrounding a side surface of the upper plate and controlling entry and exit of the air in the upward and lateral directions of the vacuum container according to a vertical movement of the outer ring with respect to the upper plate; a segment slidably coupled to the outer ring, moving toward a tread of the green tyre when the outer ring moves downward, and moving away from the tread of the green tyre when the outer ring moves upward; and a lower plate having a vacuum suction hole for discharging the air downward and slidably supporting the segment, wherein, when the outer ring moves downward and the outer ring contacts the upper plate and the lower plate, the entry and exit of the air in the upward and lateral directions of the vacuum container are blocked, and wherein an air suction path is formed only at the vacuum suction hole formed at a position different from a position of a tread mold contacting a tyre tread, and/or wherein the upper plate comprises an upper discharge hole formed overlapping the segment in a vertical direction and the segment comprises a guide block that is slidably insertion-coupled to the upper discharge hole and moves together when the outer ring moves upward and the segment moves away from the tread, thereby allowing an air flow in the upward direction through the upper discharge hole, and moves together when the outer ring moves downward and the segment moves toward the tread, thereby blocking the air flow through the upper discharge hole.