A lever-type connector comprising: a mating housing having a cam boss ; a housing that is fitted into and removed from the mating housing ; and a lever that is rotatably supported by the housing via a support shaft of the housing , has a cam groove engaging with the cam boss , and is rotated in a rotation direction (C) from a temporary locking position to cause the cam groove to engage with the cam boss , thus moving the mating housing toward the housing and fitting the mating housing and the housing to each other, wherein the lever includes a temporary locking arm portion that has a temporary locking portion and is elastically deformable, the housing includes a temporarily locked portion that is temporarily locked to and unlocked from the temporary locking portion of the temporary locking arm portion , the mating housing includes a release rib portion that releases a temporary locking state between the temporary locking portion and the temporarily locked portion , and the cam groove of the lever includes a boss receiving portion that receives the cam boss when the temporary locking state of the temporary locking portion and the temporarily locked portion is released in a state where the mating housing and the housing are temporarily set, characterized in that the boss receiving portion is formed by cutting, in an L shape, the lower side of the cam groove closer to an entrance of the cam boss , such that, in the state where the mating housing and the housing are temporarily set, the cam boss abuts against the boss receiving portion of the cam groove of the lever and such that if a hood portion of the mating housing is pushed further into a hood portion of the housing , the rotation of an operating portion of the lever in the rotation direction (C) is prevented. a mating housing having a cam boss ; a housing that is fitted into and removed from the mating housing ; and a lever that is rotatably supported by the housing via a support shaft of the housing , has a cam groove engaging with the cam boss , and is rotated in a rotation direction (C) from a temporary locking position to cause the cam groove to engage with the cam boss , thus moving the mating housing toward the housing and fitting the mating housing and the housing to each other, wherein the lever includes a temporary locking arm portion that has a temporary locking portion and is elastically deformable, the housing includes a temporarily locked portion that is temporarily locked to and unlocked from the temporary locking portion of the temporary locking arm portion , the mating housing includes a release rib portion that releases a temporary locking state between the temporary locking portion and the temporarily locked portion , and the cam groove of the lever includes a boss receiving portion that receives the cam boss when the temporary locking state of the temporary locking portion and the temporarily locked portion is released in a state where the mating housing and the housing are temporarily set, characterized in that the boss receiving portion is formed by cutting, in an L shape, the lower side of the cam groove closer to an entrance of the cam boss , such that, in the state where the mating housing and the housing are temporarily set, the cam boss abuts against the boss receiving portion of the cam groove of the lever and such that if a hood portion of the mating housing is pushed further into a hood portion of the housing , the rotation of an operating portion of the lever in the rotation direction (C) is prevented. <EOS>