To provide a partition device for preventing the entry of an odorous component or a component such as moisture or oil that occurs during cooking in a kitchen space into another space.

An exhaust blowing system is arranged in a space K in which a kitchen counter with a heating cooker is arranged. The exhaust blowing system includes: a first blower 1a for forming an air curtain A at least throughout the entire length in the depth direction of the heating cooker, on a side of the heating cooker; a second blower 1b for forming an air curtain for partitioning the space into the kitchen space for arranging the kitchen counter and another space, on a side of the kitchen counter; and an exhaust device arranged above the heating cooker.