To provide a tube pump with a simple structure which is advantageous to be downsized.

The tube pump 1A includes: a main body 2 having a groove 20 into which a tube 100 is fit; a rotor 5 rotatably disposed to the main body 2; a press-closing part 54 spirally provided on the outer peripheral surface of the rotor 5 and closing the tube 100 by pressure; a vibrator 6; a driven body 4 abutted by the vibrator 6; and a torque transmitting mechanism (transmission) 3 for transmitting the rotation of the driven body 4 to the rotor 5. The vibrator 6 is composed by laminating electrodes, piezoelectric elements, and a reinforcement plate, and when an AC voltage is applied to the piezoelectric elements, it vibrates longitudinally (vertical vibration) with small amplitudes due to the expansion and contraction of the piezoelectric elements. The driven body 4 is subjected to a frictional force (pressing force) from a protruding part 66 when the vibrator is expanded, and thus driven to rotate by the repeated frictional forces (pressing forces).