A connector device comprises a connector and a mating connector mateable with each other. The connector comprises a housing, a sub-housing movable relative to the housing and a detection terminal held by the sub-housing. The mating connector comprises a mating housing and a mating detection terminal held by the mating housing. The housing is turnable about a shaft thereof relative to the mating housing. The sub-housing has a guided portion. The mating housing has a guide portion. While the housing is turned relative to the mating housing, the guide portion guides the guided portion to move the sub-housing relative to the housing. As a result, the detection terminal is moved downward along an upper-lower direction perpendicular to an axial direction of the shaft to be connected to the mating detection terminal.