A catheter 60 includes a blood feeding lumen 61 extending in an axial direction, a blood feeding side hole 63 communicating with a distal end of the blood feeding lumen, and a rectification part 70 that is disposed in the blood feeding lumen at a position facing the blood feeding side hole of the blood feeding lumen and rises in a direction intersecting with the axial direction. Blood flowing out of the catheter is dispersed to soften a collision of the blood with a blood vessel wall.
