The present invention concerns an auxiliary pad for absorbent article that can prevent body fluid from leaking along with the dislocation of an absorbent article such as sanitary napkin, and provides a hygienic article that can reduce the occurrence of body fluid leak, even when the dislocation of fitting happens, all the way securing a sufficient adhesion to the inside of the thigh. An auxiliary pad for absorbent article (2), comprising an absorbent sheet body (5) adhered to the inside of the thigh of the wearer for absorbing body fluid, a linkage stem body (9) for linking the absorbent sheet body and an junction sheet body (7), and the junction sheet body (7) to which an adhesive (6) is applied, is attached to a sanitary napkin (10) to constitute a sanitary article (1).