Provided are a manufacturing method of a rotor of a motor integrated pump capable of more reliably restraining the influence of operating fluid of the pump on the magnet and a motor integrated pump with the rotor is provided. The method includes: a magnet support process, supporting a magnet (11) inserted in a die (30) through a first, second and third pins (40,41,42); and a support component removing process, drawing out the first, second and third pins (40,41,42) from a first cavity (34) of the die (30) through a first, second and third implementation components (46,47,48) in the process offilling resin in the die (30). Therefore, even if in the region wherein, magnet is supported by the first, second and third pins (40,41,42), the shaping resin can be used to overcast.