The present invention relates to a chair for correcting a posture, which corrects left and right heights of a seat unit of a chair to be capable of correcting the posture according to a body shape and a posture of a user and to be capable of preventing scoliosis. The present invention provides the chair for correcting the posture, provided with the seat unit (100) and a back of the chair at a support frame (10) coupled to the seat unit (100), wherein the chair comprises: a first lifting and lowering module (110A) and a second lifting and lowering (110B) installed at both left and right sides of a seat panel (101) of the seat unit (100) to be lifted and lowered according to a control signal; and a lumbar support unit (200A) and a thoracic vertebra support unit (200B) provided at predetermined interval on the support frame (10) and installed to be able to move up and down and to rotate.
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