A connector structure with a detachable mounting tube comprises a mounting pipe with an inner sliding pipe detachably secured to an end of a connector. The connector structure not only can be provided for insertion of an ordinary screwdriver head to carry out screwing and unscrewing operation. Further, when the mounting tube is detached from the connector, a special tool head with a big head and a short length can also be inserted in the connector, thus overcoming the conventional technique bottleneck of needing two different connectors. Besides, the mounting tube is detachable from the connector, for the sake of simplification, the sliding pipe and the mounting tube are integral with each other.