The utility model discloses an agitator, wherein, the receiving space that this agitator was not using its body and occupies reduces, and the container may not receive the installation or dismantle onthe body of hindrance ground, and the observability of the inside part of container improves to the noise that produces during the operation reduces. This agitator includes: the body, this body includes motor and vacuum pump, the container, this container is installed on the body and install the container lid on container upper portion including processing means and the air -tight who rotatably installs in the container with the detachable mode, first vacuum tube, this first vacuum tube is connected to the vacuum pump, and the sound -proof housing, this sound -proof housing is installed on the body in order covering the container, the sound -proof housing can follow the body dismantle with body clean separation to when the sound -proof housing was installed on the body, the sound -proof housing had and seals the opening of the one end of sound -proof housing and the inner space that seals through the body, and wherein, a tip of first vacuum tube exposes in the inner space when the sound -proof housing is installed on the body.