BLENDER

Proposed is a blender which has a pneumatic inspection structure for inspecting whether airtightness is maintained between an outer container body and an inner container body of a container body configured as a double structure. The blender includes the container body in which food is received, a main body provided under the container body and configured to support the container body, and a container lid mounted detachably to an upper surface of the container body and configured to open and close the upper surface of the container body, wherein the container body includes the outer container body constituting an exterior thereof, and the inner container body provided inside the outer container body, wherein space between the outer container body and the inner container body is blocked from the outside and is sealed.