The prevent invention provides a lever-equipped connector unit, which comprises a housing being capable of receiving a terminal; a lever rotatably coupled to the housing, and formed in a horseshoe shape; and a counter housing engageable with the housing, wherein the lever has a pair of arm plates configured to sandwich the housing and having a cam portion therein, wherein the counter housing has a peripheral wall engageable with the housing, and a pair of driven pins being slidably engageable with the cam portion and formed in the both outer surfaces of the peripheral wall, and wherein the housing engages with the counter housing as the driven pin proceeds into the cam portion, and the lever rotates from its stand-by state.