A connector assembly comprising: a first connector (11, 51, 71) including a first insulator (13, 53, 73) and a first contact (14, 54, 74), the first contact being held by the first insulator; a second connector (21, 31, 61, 81) including a second insulator (23, 33, 63, 83) and a second contact (24, 64, 84) and being fitted to the first connector along a fitting direction, the second contact being held by the second insulator; a lever member (22, 32, 62, 82) held by one of the first insulator and the second insulator in a rotatable manner about a rotational axis: a cam mechanism (13F, 22D, 53F, 62D, 73F, 82D) moving the first insulator and the second insulator relatively along the fitting direction in conjunction with rotation of the lever member, wherein, when the lever member is rotated from an initial rotation position to a first rotation position with the second insulator being situated at a start-of-fitting position with respect to the first insulator, the cam mechanism moves the second insulator to a fitting position along the fitting direction, characterized by a rotational shaft member (25, 35, 65, 85) extending along the rotational axis and rotating in accordance with rotation of the lever member, the rotational shaft member including a cam surface (25D, F12, F22) for pressing the first contact and the second contact against each other; and when the lever member is further rotated from the first rotation position to a second rotation position, the first contact and the second contact are brought into contact with each other with a predetermined contact pressure due to the cam surface of the rotational shaft member while the second insulator is kept at the fitting position. a first connector (11, 51, 71) including a first insulator (13, 53, 73) and a first contact (14, 54, 74), the first contact being held by the first insulator; a second connector (21, 31, 61, 81) including a second insulator (23, 33, 63, 83) and a second contact (24, 64, 84) and being fitted to the first connector along a fitting direction, the second contact being held by the second insulator; a lever member (22, 32, 62, 82) held by one of the first insulator and the second insulator in a rotatable manner about a rotational axis: a cam mechanism (13F, 22D, 53F, 62D, 73F, 82D) moving the first insulator and the second insulator relatively along the fitting direction in conjunction with rotation of the lever member, wherein, when the lever member is rotated from an initial rotation position to a first rotation position with the second insulator being situated at a start-of-fitting position with respect to the first insulator, the cam mechanism moves the second insulator to a fitting position along the fitting direction, characterized by a rotational shaft member (25, 35, 65, 85) extending along the rotational axis and rotating in accordance with rotation of the lever member, the rotational shaft member including a cam surface (25D, F12, F22) for pressing the first contact and the second contact against each other; and when the lever member is further rotated from the first rotation position to a second rotation position, the first contact and the second contact are brought into contact with each other with a predetermined contact pressure due to the cam surface of the rotational shaft member while the second insulator is kept at the fitting position. a cam mechanism (13F, 22D, 53F, 62D, 73F, 82D) moving the first insulator and the second insulator relatively along the fitting direction in conjunction with rotation of the lever member, wherein, when the lever member is rotated from an initial rotation position to a first rotation position with the second insulator being situated at a start-of-fitting position with respect to the first insulator, the cam mechanism moves the second insulator to a fitting position along the fitting direction, characterized by a rotational shaft member (25, 35, 65, 85) extending along the rotational axis and rotating in accordance with rotation of the lever member, the rotational shaft member including a cam surface (25D, F12, F22) for pressing the first contact and the second contact against each other; and when the lever member is further rotated from the first rotation position to a second rotation position, the first contact and the second contact are brought into contact with each other with a predetermined contact pressure due to the cam surface of the rotational shaft member while the second insulator is kept at the fitting position.