To provide a tube pump and a fluid injection device capable of stably exhibiting desired suction force at a low cost.

This tube pump 100 includes a frame part 120 having a tube part 110 disposed therein, an abutting part 130 that abuts on the tube part 110 so as to crush it and moves along the tube part 110, and a motor part 150. The whole shape of the tube part 110 is long. The long tube part 110 is curved and is disposed in the frame part 120. The tube part 110 has an annularly-formed tube part 114 forming an annular part by a portion of the tube part 110 crossing itself, and an outwardly projecting tube part 115 disposed projecting outward from the annularly-formed tube part 114. Out of the outwardly projecting tube part 115, an adjacent outwardly projecting tube part 115a disposed adjacent the annularly-formed tube part 114 is disposed in the radial direction of the annular part and on the outside of the annularly-formed tube part 114.