A blender includes a lid configured to shield the opened upper surface of a container, in which the lid includes a main lid seated on the container and having a through-hole opened to communicate with an inside of the container, a gasket provided around the main lid and being in contact with the inner surface of the container, and an auxiliary lid inserted into the through-hole and exposed from the upper surface of the main lid, the auxiliary lid is coupled to the main lid and rotated together with the main lid in a state of being inserted into the through-hole, and the gasket protrudes to be in close contact with the inner surface of the container according to the rotational manipulation of the auxiliary lid.