Tube pump and tube stabilizer

A tube pump, comprising:

• a cap having a cylindrical inner circumferential surface;
• a tube arranged along the inner circumferential surface of the cap;
• a roller having a shaft;
• a rotor configured to hold the roller to be able to make an orbital motion along the inner circumferential surface of the cap, and to transport content of the tube by pressing the tube with the roller and thereby causing a peristaltic motion of the tube;
• and
• a base to which the cap is attached,
• wherein:
• the rotor includes a disk part which holds the roller on a base side;
• and
• a rotatable tube press member capable of rotating along an outer circumferential part of the disk part provided at the outer circumferential part of the disk part, said tube press member having an inner diameter lying outside the shaft of said roller in a radial direction, wherein said tube press member engages with the disk part to create a frictional force between the tube and the tube press member sufficient so that the tube press member does not move and the tube is not pulled by the tube press member, wherein the tube press member prevents the tube from moving to the base side and seals a gap formed with respect to the inner circumferential surface of the cap.