An oil extractor that includes: a main body housing； a motor； a feed hopper detachably coupled to the upper end of the main body housing to feed grain； a shell that communicates with the lower end of the feed hopper to receive the grain and is detachably coupled to one side of the main body housing； a screw shaft inserted into the shell and having an end portion that passes through one side of the main body housing and is coupled to the motor； a fastening means for detachably coupling the shell to the main body housing； and a shell cover surrounding the shell. The shell cover has a groove formed on its lower portion for receiving the shell and is supported by the main body housing and moves between a first position at which the shell is covered and a second position at which the shell is exposed.
