The connection of rebar of concrete structures by looping rebars with the formation of the joint core was developed at the beginning of the last century, but it has not been actively used due to the complexity of the work and the lack of calculation methods. The article presents a review of the history of the creation, practical application, national and foreign scientific research of the loop joints of rebar in concrete structures. The article describes advantages and disadvantages of such joints, gives brief information about the main parameters of the joints and the principle of operation. Suggestions for the directions of further study of the looped joints of reinforcing bars operation are presented, the goals for full-scale and numerical experimental research aimed at the development of calculation and design methods of looped joints for their further wider introduction into the construction practice are set.