To provide a manufacturing method of a stationary blade stage for easily transmitting heat of a blade part to an outside casing part in a turbo-molecular pump.

A manufacturing process of the stationary blade stage 2 of the turbo-molecular pump forms an intermediate process member 1 composed of a first cylindrical part 1a of an outer peripheral part, a disk-like part 1b of an inner peripheral part of the first cylindrical part 1a and a second cylindrical part 1c of an inner peripheral part of the disk-like part 1b by integrally cutting out of a raw material. A large number of stationary blades 1ba are formed in the disk-like part 1b by upward cut work of a press. The intermediate process member 1 is divided into two parts along a diametral line passing through the center of the intermediate process member 1, and the stationary blade stage 2 composed of two semicircular shapes is formed.