A rotary connector 1 has a fixed case 3 for being mounted on a base 5 for a switch 4. The fixed case 3 has a first screw insertion hole 3a formed open therein for insertion of a screw 6. The screw 6 has a flange 6a. The fixed case 3 or the base 5 has a resilient pawl 3f formed therein for engagement with the flange 6a. With such structure, it is possible to screw-fix both the rotary connector and the base onto the steering column. The screw is securely kept in the rotary connector during transport and assembly by the resilient pawl.