Tube joining device

A tube joining device that fuses a first tube and a second tube using a plate-shaped cutting member that is heated, and superimposes a fusible end of the first tube on a fusible end of the second tube and joins the fusible ends in an aseptic condition, the tube joining device comprising:

• a plate-shaped cutting member;
• means for heating said cutting member;
• a first tube holding portion that is capable of holding a first tube;
• a second tube holding portion that is disposed adjacent to the first tube holding portion, and is capable of holding a second tube parallel to the first tube in a tube extension direction;
• and
• a housing that is provided with a cover member that is closed to cover a fusing-joining site of the first tube and a fusion-joining site of the second tube,
• wherein the cover member is slidable along a sliding direction perpendicular to the tube extension direction and further includes a first pressing member and a second pressing member which are configured to approach each other or to separate from each other along the sliding direction, and to maintain the first tube and the second tube in a pressed state,
• the first tube holding portion and the second tube holding portion are disposed between the first pressing member and the second pressing member, and
• the housing includes a first link mechanism that causes the first tube holding portion and the second tube holding portion to approach the first pressing member or to separate therefrom in synchronization with the approach or separation of the first pressing member and the second pressing member.