A sitting posture corrector comprises: a track disposed on a bottom of a table top； two clamping members respectively disposed on two sides of the track at a predetermined distance, so that the user's legs are placed on the two clamping members a driving unit for driving the clamping members closer to or away from each other； the two sensing units are disposed on the two clamping members, and the sensing unit transmits a correction signal when the user's legs touch the sensing unit And a control unit that controls the driving unit to drive the two clamping members to clamp the user's legs according to the correction signal to be in a clamping state.一種坐姿矯正器，包含：一軌道，設置於一桌子之桌面底部；兩夾持件，以一預設距離分別設置於軌道之兩側，藉以供使用者之雙腿置於兩夾持件之間；一驅動單元，用以驅動夾持件相互靠近或遠離；兩感測單元，設置於兩夾持件上，當使用者之雙腿碰觸感測單元時，感測單元傳輸一矯正訊號；以及一控制單元，依據矯正訊號控制驅動單元驅動兩夾持件夾持使用者之雙腿而呈一夾持狀態。
