Abstract: A dual side-hook structure is a hook unit with four hooks. The hook unit is latched on a horizontal, vertical or inclined rope or a long strip object without shifting to hang up an object without limitation in space. The hook unit includes positioning hooks on an upper end of the hook unit and hanging hooks on a lower end of the hook unit. A rope is enabled to pass through the positioning hooks or hanging hooks at two sides of the hook unit, and then the hook unit is secured on a fixed point on the rope without sliding freely. Edges of the positioning hooks and hanging hooks include abutting devices to prevent the rope from sliding out of the hook unit. The hook unit is positioned on a vertical rope by using the hanging hooks horizontally. The positioning hooks and the hanging hooks are used interchangeably. The entire hook unit is used very flexibly and versatilely without limitation in space, and is especially usable in a wild field, an outdoor area or a camping ground.