The present disposable push up bra liner consists of a pair of bra cup pads and a center pad, each having an adhesive side for removably attaching said pad to a bra and an absorptive side composed of four separate layers. The present invention provides a novel and comfortable means for absorbing excessive perspiration around the bra line in order to avoid unsightly stains on the wearer's surrounding clothing and odors. The present invention is simple to use, easy to install, and may be freely disposed of at any point. The disposable bra liner further provides vertical support for a wearer's breasts, essentially converting any conventional bra into a push-up bra.