To reliably dry a bearing part for a low-temperature liquefied gas pump.

In a pump 30, drying gas supplying passages 31 for blowing drying gas to bearing parts 18 are provided, the tips 31a are faced to the bearing parts, the base ends 31b are opened to the outer surface of a casing 14, and drying gas pipes 33 are enabled to be attached and detached in relation to the base ends. Valves 34 may be provided on the base ends of the supplying passages. In a drying method for the pump, the drying gas pipes 33 are connected to the base ends of the supplying passages 21, drying gas is directly blown to the bearing parts 18 through the drying gas pipes 33 and the supplying passages 31, and the bearing parts 18 are forcibly dried.