A blower comprising: a lower body (10; 110) having a suction hole (12; 112) formed through a side surface of the lower body (10; 110); a fan causing airflow and disposed in the lower body; a first upper body (20; 120) positioned above the lower body (10; 110), elongated long in the up-down direction; a second upper body (30; 130) positioned above the lower body (10; 110), elongated long in the up-down direction, wherein the second upper body (30; 130) is spaced apart laterally from the first upper body (20; 120); a space (9; 109) formed between the first upper body (20; 120) and the second upper body (30; 130), wherein the space is opened in front-rear direction; a first slit (20S; 120S) discharging air of inner space of the first upper body (20; 120) to the space (9; 109); and a second slit (30S; 130S) discharging air of inner space of the second upper body (30; 130) to the space (9; 109); wherein the first upper body (20; 120) includes a first boundary surface (21; 121) toward the space (9; 109) and defining a part of a boundary of the space (9; 109), and the first upper body (20; 120) includes a first outer surface (22; 122) opposed the first boundary surface (21; 121), wherein the second upper body (30; 130) includes a second boundary surface (31; 131) toward the space (9; 109) and defining a part of a boundary of the space (9; 109), and the second upper body (30; 130) includes a second outer surface (32; 132) opposed the second boundary surface (31; 131), wherein the first outer surface (22; 122) is inclined in a direction toward the space (9; 109) with respect to a vertical line extending in the up-down direction, wherein the second outer surface (32; 132) is inclined in a direction toward the space (9; 109) with respect to a vertical line extending in the up-down direction, wherein the first boundary surface and the second boundary surface face each other and are convex toward each other, wherein the first outer surface is convex and opposes the first boundary surface, and wherein the second outer surface is convex and opposes the second boundary surface. a lower body (10; 110) having a suction hole (12; 112) formed through a side surface of the lower body (10; 110); a fan causing airflow and disposed in the lower body; a first upper body (20; 120) positioned above the lower body (10; 110), elongated long in the up-down direction; a second upper body (30; 130) positioned above the lower body (10; 110), elongated long in the up-down direction, wherein the second upper body (30; 130) is spaced apart laterally from the first upper body (20; 120); a space (9; 109) formed between the first upper body (20; 120) and the second upper body (30; 130), wherein the space is opened in front-rear direction; a first slit (20S; 120S) discharging air of inner space of the first upper body (20; 120) to the space (9; 109); and a second slit (30S; 130S) discharging air of inner space of the second upper body (30; 130) to the space (9; 109); wherein the first upper body (20; 120) includes a first boundary surface (21; 121) toward the space (9; 109) and defining a part of a boundary of the space (9; 109), and the first upper body (20; 120) includes a first outer surface (22; 122) opposed the first boundary surface (21; 121), wherein the second upper body (30; 130) includes a second boundary surface (31; 131) toward the space (9; 109) and defining a part of a boundary of the space (9; 109), and the second upper body (30; 130) includes a second outer surface (32; 132) opposed the second boundary surface (31; 131), wherein the first outer surface (22; 122) is inclined in a direction toward the space (9; 109) with respect to a vertical line extending in the up-down direction, wherein the second outer surface (32; 132) is inclined in a direction toward the space (9; 109) with respect to a vertical line extending in the up-down direction, wherein the first boundary surface and the second boundary surface face each other and are convex toward each other, wherein the first outer surface is convex and opposes the first boundary surface, and wherein the second outer surface is convex and opposes the second boundary surface.