Rod for cervical vertebra and connecting system thereof

A connector connecting an implant to a bone connecting rod, comprising:

• a first fastening member comprising a fastening groove and an engagement hole, wherein the engagement hole and a head portion of the implant which can be anchored to a vertebra are configured to allow the head portion to be freely inserted in the engagement hole;
• and
• a second fastening member comprising a fastening groove and an insertion hole, wherein the insertion hole and the bone connecting rod are configured to allow the bone connecting rod to be freely inserted through the insertion hole;
• wherein the first fastening member further comprises a through hole oriented in a direction crossing the fastening groove in the first fastening member,
• wherein the second fastening member further comprises a through hole oriented in a direction crossing the fastening groove in the second fastening member, and wherein the connector further comprising:
• a fastening device that freely penetrates the through holes of the first and second fastening members.