To provide a method for replacing electric motor for driving a continuous rolling mill which shortens the period of rolling mill stoppage due to motor replacing work into within three days per stand.

When replacing the electric motor for driving the continuous rolling mill, the electric motor (example: DM12) being a present object of replacement is hung and transported using a gantry crane 9. Further, a deck 5 for temporarily placing an electric motor is provided above an existing electric motor (example: DM33) which is not a present object of replacement and the electric motor is replaced through the deck.