Abstract: A posture-correcting underwear with good supporting and invisibility effects comprises a bra body comprising a front panel and a back panel, wherein the shoulder position of the front panel is connected with the shoulder position of the back panel to form a shoulder strap, and the side edge of the front panel is connected with the side edge of the back panel to form a side wing; each shoulder strap is respectively provided with a posture-correcting strap; one end of each posture-correcting strap is connected with the shoulder strap, and the other end of each posture-correcting strap is movably extended towards the back panel; the posture-correcting straps extend from the shoulder position of the bra body towards the back, and pass through the back and turn back to the front panel from the armpit, and then pass through the side wing, and are connected in front of the under bust.