A posture loop includes an elastic band or cable (10) having two ends (11, 12), a bridge (3) having a bar (30), the cable includes a middle portion engaged with one end of the bar (32), and the ends of the cable are engaged with the other end (33) of the bar, and two buckles (40) are attached to the ends of the cable for adjustably coupling the ends of the cable to the other end of the bar and for forming an eight (8)-shaped structure for the posture loop and for engaging onto shoulders of a user. The buckles each include two grooves formed by a rib for engaging with the ends of the cable respectively.
