PROBLEM TO BE SOLVED: To widen an adjustable range of a flow rate of hot air in a bulkiness recovery apparatus.SOLUTION: There is provided an apparatus for recovering bulkiness of a nonwoven fabric by blowing hot air to the nonwoven fabric that is conveyed in a conveyance direction to heat. The apparatus includes a case member that is opened at both ends in the conveyance direction. An opening at one end of the case member in the conveyance direction is provided with an entrance at the time of conveying a nonwoven fabric. An opening on the other end of the case member in the conveyance direction is provided with an exit at the time of conveying a nonwoven fabric. On a wall surface along the conveyance direction between the entrance and the exit of the case member, a jetting port is provided for jetting the hot air into a space inside the case member toward the conveyance direction or a direction opposite to the conveyance direction. At a part on a downstream side of the case member in a direction for jetting the hot air, a discharge port is provided for discharging the hot air from a space inside the case member. The hot air flows from the jetting port toward the discharge port while contacting with one surface of both surfaces of the nonwoven fabric in a space inside the case member.
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