Disposable under-shorts having a fit-gather laminate and capable of being produced at high speeds without complicating the construction of a production device. Disposable under-shorts comprising a fit-gather laminate (2) formed by disposing between a pair of upper and lower non-woven fabric sheets (6, 7) an elastic member (1) in their width directions, fixing it to portions except for a width-wise center parts of the non-woven fabric sheets (6, 7) and cutting it at the width-wise center parts of the sheets (6, 7) a reinforcing sheet (3) fixed to the under-side of the width-wise center parts of the fit-gather laminate (2) an absorber (4) disposed on the upper-side of the laminate (2) and a back sheet (5) disposed on the under-side of the reinforcing sheet (3) and a production method therefor.
