A blood-pumping device (10) comprises a cavity (20) with an at least partly U-shaped wall, the at least partly U-shaped wall comprising a two straight regions and a arch-shaped region connecting the two straight regions and a U-shaped tube (30), which is at least partially aligned with the at leas partly U-shaped wall of the cavity (20) to provide a support for the U- shaped tube (30), wherein the U-shaped tube (30) comprises a first and a second straight regions (32a, 32b) connected by a semicircular region (34). The blood-pumping device (10) further comprises an arm (50) rotatable about a center point (M) of the semicircular region (34), wherein the arm (50) holds a first and a second wheel (60a, 60b) in a distance from each other such that upon rotation of the arm (50) the wheels roll along the U-shaped tube while putting pressure on the U-shaped tube (30), wherein the arch-shaped region of the U-shaped wall of the cavity (20) comprises a recess portion (80) so that the wheels (60) of the arm (50) impose less pressure on the tube (30) at the recess portion (80) and upon rotation of the arm (50) a pulsating blood flow is generated.
