The present invention corresponds to a device for positioning elements along a support body, comprising a first plate with a groove on its perimeter and a second plate with a groove on its perimeter, the first plate is in contact with the second plate, wherein the groove of the first plate and the groove of the second plate are coincident, and in which the positioning elements are arranged between the grooves of the first plate and the second plate. Additionally, the first plate and second plate have fastening means allowing them to be fastened to the support body.