To improve the security and disaster prevention by preventing a short circuit and an arc discharge when handling a connector.

In the connector connecting structure in which a male terminal side connector having a male terminal 11d in a connector inserting opening 11c and a female terminal connector 10 having a female terminal in the connector inserting opening 11c are intervened in a vehicle electric equipment circuit 1 for feeding a power source of a vehicle power source 2, and the vehicle electric equipment circuit 1 is connected by installing the male terminal side connector 11 and the female terminal side connector 10, the female terminal side connector 10 is arranged at the upstream side of the vehicle electric equipment circuit 1, and the male terminal side connector 10 is arranged at the downstream side of the vehicle electric equipment circuit 1.