PURPOSE: To deaerate quickly out of a polymer.

CONSTITUTION: A vacuum tank 1 of a continuous vacuum baking device is divided into a vacuum chamber 2, a gas deaeration chamber 3 and cooling chamber 4, and airtight shutters 8 are provided in respective treating chambers. Respective treatment processes are carried out exclusively in respective exclusive treating chambers to shorten the time for temperature rise, cooling, deaeration and leakage, and as a result, the whole treatment process is shortened and high speed continuous gas deaeration can be carried out for the products of mass production.