To provide a level adjustment device capable of easily carrying out jackup by a built-in hydraulic pump and improving efficiency and safety of work at the time of adjusting height of an apparatus leg part.

A hydraulic pressure generating device 11 built in a frame body 9 and an electric motor 17 which is built in the aforementioned frame body 9 and drives the aforementioned hydraulic pressure generating device 11 are furnished, and a level of an apparatus leg part is adjusted by controlling the aforementioned electric motor 11 by a control signal to be supplied from outside of the aforementioned frame body 9.