A wearing article capable of suppressing the occurrence of a loss of materials and an increase of the cost of facilities and a method of manufacturing the same are provided. A wearing article includes a waist portion 3 formed in a ring shape capable of continuously surrounding the waist of the wearer and using one of openings as a waist opening 9, and a crotch portion 4 joined to the waist portion 3 across an opening on the opposite side to the waist opening 9 so that the crotch portion 4 and the waist portion 3 define a pair of leg openings 10 for the wearer to put through his legs individually. Shirring is formed in the crotch portion 4 so as to shorten the distance between the mutually opposing inner surfaces of the waist portion 3 connected to each other by the crotch portion 4.