A centrifuge vessel comprising: a body unit that is rotatable; a cover part that covers the body unit; and a connection part provided in the cover part and comprising a plurality of connection pipes and in fluid communication with an inside of the body unit, wherein the body unit comprises a side accommodation part formed on a side surface of the body unit by extending radially outwards in all directions and protruding radially outward of the body unit, characterized in that the centrifugation vessel comprises a plate, said plate being a body of revolution and having a radial end positioned on the side accommodation part, wherein a side flow path in fluid communication with one connection pipe of the plurality of connection pipes (111, 112) is provided inside the plate, wherein the plate is configured not to rotate when the body unit rotates, wherein an end of the other connection pipe of the connection pipes and reaches the lower body of the body unit, wherein the connection part further comprises a connection pipe housing, the other connection pipe of the plurality of connection pipes and reaches the lower body of the body unit through a central flow path, a part of the central flow path is provided inside the connection pipe housing, the one connection pipe is in fluid communication with the side flow path through a space between the connection pipe housing and the central flow path, and a side flow path opening connecting a space between the connection pipe housing and the central flow path to the side flow path is disposed at a center of the plate, wherein outside of the centrifuge vessel and inside of the side accommodation part are in fluid communication through the connection pipe and the side flow path, wherein a substance accommodated in the side accommodation part is discharged to the outside of the centrifuge vessel through the one connection pipe and the side flow path, and a substance outside the centrifuge vessel is introduced into the side accommodating part, wherein a diameter of an upper portion of the connection pipe housing is smaller than a diameter of a lower portion of the connection pipe housing, the central flow path is inserted into and coupled with the upper portion of the connection pipe housing, and the side flow path opening is inserted into and coupled with the lower portion of the connection pipe housing. a body unit that is rotatable; a cover part that covers the body unit; and a connection part provided in the cover part and comprising a plurality of connection pipes and in fluid communication with an inside of the body unit, wherein the body unit comprises a side accommodation part formed on a side surface of the body unit by extending radially outwards in all directions and protruding radially outward of the body unit, characterized in that the centrifugation vessel comprises a plate, said plate being a body of revolution and having a radial end positioned on the side accommodation part, wherein a side flow path in fluid communication with one connection pipe of the plurality of connection pipes (111, 112) is provided inside the plate, wherein the plate is configured not to rotate when the body unit rotates, wherein an end of the other connection pipe of the connection pipes and reaches the lower body of the body unit, wherein the connection part further comprises a connection pipe housing, the other connection pipe of the plurality of connection pipes and reaches the lower body of the body unit through a central flow path, a part of the central flow path is provided inside the connection pipe housing, the one connection pipe is in fluid communication with the side flow path through a space between the connection pipe housing and the central flow path, and a side flow path opening connecting a space between the connection pipe housing and the central flow path to the side flow path is disposed at a center of the plate, wherein outside of the centrifuge vessel and inside of the side accommodation part are in fluid communication through the connection pipe and the side flow path, wherein a substance accommodated in the side accommodation part is discharged to the outside of the centrifuge vessel through the one connection pipe and the side flow path, and a substance outside the centrifuge vessel is introduced into the side accommodating part, wherein a diameter of an upper portion of the connection pipe housing is smaller than a diameter of a lower portion of the connection pipe housing, the central flow path is inserted into and coupled with the upper portion of the connection pipe housing, and the side flow path opening is inserted into and coupled with the lower portion of the connection pipe housing.