A tube pump system comprising: a housing unit which has an inner peripheral surface formed into a circular-arc shape around an axis line; a tube having flexibility which is arranged along the inner peripheral surface; a pair of roller units (10, 20) which are housed in the housing unit, and are rotated around the axis line from a closing position to a releasing position around the axis line in a state where the pair of roller units (10, 20) close the tube; a pair of drive units (50, 60) which are configured to respectively rotate the pair of roller units (10, 20) around the axis line in a same direction; a control unit which is configured to control each of the pair of drive units (50, 60) such that a liquid which flows into the tube from one end of the tube is discharged from the other end of the tube; and a pressure detection unit which is configured to detect a pressure of a liquid in a pipe connected to the other end of the tube, wherein the control unit is configured to control a first rotation angle around the axis line and a second rotation angle around the axis line on the basis of the pressure of the liquid in the pipe detected by the pressure detection unit such that fluctuation of the pressure of the liquid detected by the pressure detection unit when the pair of roller units (10, 20) are rotated through at least one revolution falls within a predetermined value, the first rotation angle being formed between the pair of roller units (10, 20) when a first roller unit of the pair of roller units (10, 20) passes through the closing position, and the second rotation angle being formed between the pair of roller units (10, 20) when a second roller unit of the pair of roller units (10, 20) passes through the releasing position. a housing unit which has an inner peripheral surface formed into a circular-arc shape around an axis line; a tube having flexibility which is arranged along the inner peripheral surface; a pair of roller units (10, 20) which are housed in the housing unit, and are rotated around the axis line from a closing position to a releasing position around the axis line in a state where the pair of roller units (10, 20) close the tube; a pair of drive units (50, 60) which are configured to respectively rotate the pair of roller units (10, 20) around the axis line in a same direction; a control unit which is configured to control each of the pair of drive units (50, 60) such that a liquid which flows into the tube from one end of the tube is discharged from the other end of the tube; and a pressure detection unit which is configured to detect a pressure of a liquid in a pipe connected to the other end of the tube, wherein the control unit is configured to control a first rotation angle around the axis line and a second rotation angle around the axis line on the basis of the pressure of the liquid in the pipe detected by the pressure detection unit such that fluctuation of the pressure of the liquid detected by the pressure detection unit when the pair of roller units (10, 20) are rotated through at least one revolution falls within a predetermined value, the first rotation angle being formed between the pair of roller units (10, 20) when a first roller unit of the pair of roller units (10, 20) passes through the closing position, and the second rotation angle being formed between the pair of roller units (10, 20) when a second roller unit of the pair of roller units (10, 20) passes through the releasing position.