A vane pump provided with: a rotor that is connected to a drive shaft; a plurality of vanes that are provided so as to be capable of reciprocal motion in the radial direction with respect to the rotor; a cam ring that has a cam surface along which tips of the vanes slide in accordance with the rotation of the rotor; and a pump body that has a housing recess that houses the cam ring. The cam ring has a ring fitting part that is formed on the outer periphery thereof and that is divided into a plurality of regions and has a ring minor diameter part that is formed on the outer periphery thereof and that has a smaller outer diameter than the ring fitting part. The housing recess of the pump body has a body fitting part into which the ring fitting part fits and a body major diameter part that is formed on the inner periphery thereof, that has a larger inner diameter than the body fitting part, and that is divided into a plurality of regions.
