An attachment structure is provided for attaching a stator member of a rotating connector to a bracket fitted into a steering column while being positioned. The bracket is provided with engaging recess grooves having first and second reference surfaces each orthogonal to each other, which are arranged along the axial direction of a steering shaft, and the stator member is provided with engaging protrusions respectively inserted into the corresponding engaging recess grooves. An elastic tongue piece for elastically urging the engaging protrusions on the first reference surface is formed in the engaging recess groove. Elastic tongue pieces for elastically urging the engaging protrusions on the second reference surfaces are formed on the engaging protrusions.