PROBLEM TO BE SOLVED: To provide a smoke separating apparatus which can be installed in an indoor space where an air outlet is not provided.SOLUTION: A smoke separating apparatus 1 which can be installed in a room to be divided into a no-smoking area and a smoking area includes a side wall part 10 inside which a smoking space is formed as the smoking area, and which is box-shaped with the upper and lower side bottom faces opened to encircle the smoking space at its lateral side, a cleaning part 20 box-shaped so that a cleaning space is formed inside, and arranged above the side wall part, a blow part 21, a filter part 22 for cleaning air sucked from an air inlet into the upper cleaning space with a pressure in the cleaning space lowered by the blow part 21, a first guide part 31 provided on the inner wall of the side wall part 10 so as to be located below the air outlet for guiding the air exhausted from the air outlet to the side of the air inlet, and a second guide part 32 provided on the inner wall of the side wall part 10 so as to be located below the air inlet for guiding the air guided by the first guide part 31 to the air inlet.SELECTED DRAWING: Figure 2