This production method for an absorbent article (1) involves a step for joining fixing members (11) to a side flap (10) , a step for joining the side flap (10) to which the fixing members (11) are joined to a main sheet (4), a step for folding over the side flap (10) along the edge of the main sheet (4) in the width direction (W) , and a step for integrating the main sheet (4) having the folded side flap (10), with an absorbent body (3). As a result, it is possible to stably maintain the folded state of the side flap (10) and it is possible to suppress creases and kinks in the fixed portions (31) of the side flap (10) and a main absorbent body (2) and misalignment of the side flap (10).
