Fan unit

A fan assembly comprising:

• a fan main body including a blade that rotates, and a frame that rotatably supports the blade;
• and
• a casing including a main body provided with a housing recess in which the fan main body is to be housed, and a snap-fit portion to fix the frame in the housing recess;
• wherein
• the housing recess includes a housing bottom including a surface facing upward and a housing inner circumferential portion extending upward from the housing bottom, and opens upward;
• the snap-fit portion includes an elastic portion extending upward along the housing inner circumferential portion, and a claw portion projecting horizontally from a tip end portion of the elastic portion;
• a lower surface of the claw portion is inclined upward toward a tip of the claw portion;
• and
• the frame is interposed between and in contact with the lower surface of the claw portion and the housing bottom.