Easily-manufacturable connector capable of prevention of accidental opening of mouth of hook caused by movement of opening-closing rod in opening direction. Connector main body 3 has paired retaining holes 20,21 on both sides of hook 2 base part. Misoperation-preventive member 23 has its opposite ends formed into paired inwardly-bent engagement portions 26,27 engageable in paired retaining holes 20,21, and has its midway part 23a configured to be movable from front end of hook 2 toward opening-operation body 13 and vice versa in in-contact/out-of-contact relation. Paired engagement portions 26,27 (paired retaining holes 20,21) are axially staggered so that midway part 23a of misoperation-preventive member 23 is urged from front end of hook 2 toward opening-operation body 13. Connector main body 3 has stopper 28 for bringing midway part 23a of misoperation-preventive member 23 to stop in a position close to opening-operation body 13 against urgence on misoperation-preventive member 23.
