An air conditioning unit includes a horizontal flap (10) ; a shaft formation member (14) including shaft portions (13) on both sides; a first shaft support portion (11L) that rotatably supports the horizontal flap (10); a second shaft support portion (11R) that rotatably supports the horizontal flap (10); and a support member (15) that is provided with a support shaft hole. One of the shaft portions (13) is inserted into the support shaft hole and supported at the appropriate location on the case between the first shaft portion (11L) and the flange portion (12), and the horizontal flap (10) is rotatably supported by inserting each of the shaft portions (13) into the first rotation shaft hole and the second rotation shaft hole respectively.