Steps for installing the molded case 100 so that ventilation boots production process according to the present invention is wrapped around the mold body 200 in the mold body 200 is formed with the air passage member 230 by a predetermined distance spaced apart condition; The method comprising after filling a gap between the mold main body 200 and the vent to the forming member 230, the gap and the mold casing 100 and the vent as a forming member 230 between the resin cured to form a rain upper (20); Separating the molded case 100 in the upper rain 20; Forming at the forming the vent member 230, the vent path, removed from the upper rain 20 30; And separating the upper rain 20 and the molded body 200; , Both ends of which are opened by including and side breathable boots (1) is formed to extend longitudinally in the foot part by a buried condition on the air passage 30, upper 20 is blocked by the upper 20 to the ankle witdan characterized in that to obtain. According to the present invention, since the vent path to reach the entrance of the foot, ankle boots of front portion 30 is formed to extend in the longitudinal direction when Report the boots ventilation of the toe region itself is secured. As well as a vent in the foot portion of the entrance boots are also waterproof, secure location because it is situated on the inside of the ankle boots with breathable in the entrance to the entrance, where a high from the ground.