A posture correcting device includes a frame member having a column for engaging with a back portion of a user and having a predetermined shape for forcedly correcting a human posture of the back portion of the user, a beam laterally supported on top of the column and having a pair of curved hooks extended from the lateral beam for engaging with the shoulder portion of the user, and the frame member includes a bar laterally supported on bottom of the column and having an inner portion for engaging with a waist portion of the user, and the frame member includes a pair of straps attached to the lateral bar for engaging onto the waist portion of the user.
