A belongings pocket contains: a body, a first magnet, and a second magnet. The body includes a straight fringe and a semi-circular fringe which form the body in a semi-circle shape, and the body also includes a surface fabric, a flexible lining fabric, and an accommodation space in which an opening is defined. The first magnet and the second magnet are arranged beside two ends of the straight fringe of the body. In operation, the body is expanded flatly or the straight fringe of the body is folded in half, and two ends of the body are connected together, after the first magnet and the second magnet are magnetically attracted with each other. Furthermore, the body is erected by way of the flexible lining fabric.