A lever type connector comprising: a housing to be fitted with a mating housing; and a lever rotatably mounted to the housing, the housing being fitted with or removed from the mating housing by rotation of the lever; wherein the lever has a pair of side plate portions (13, 13) and a connection portion that connects the side plate portions (13, 13), the side plate portions (13, 13) are located outside both side surfaces of the housing, and have cam grooves (11, 11) in which cam pins (9, 9) on both side surfaces of the mating housing are engaged when the lever is rotated, on both side surfaces of the housing, shaft parts (17, 17) protrude toward the side plate portions (13, 13), the side plate portions (13, 13) have shaft hole parts (19, 19) in which the shaft parts (17, 17) are inserted to allow the lever to be rotated with respect to the housing, each of the shaft hole parts (19, 19) is provided with an insertion hole and regulators (25, 25), characterised in that: on an end portion of each of the shaft parts (17, 17) to be inserted in each of the shaft hole parts (19, 19), a pair of projections (21, 21) arranged in non-point symmetry with respect to a circumferential direction of each of the shaft parts (17, 17), is provided, when the lever is started to be mounted to the housing, the projections (21, 21) are inserted in each of the shaft hole parts (19, 19) through the insertion hole, and the regulators (25, 25) are arranged to face the projections (21, 21) in a direction in which the side plate portions (13, 13) are away from both side surface of the housing, within a rotation range of the lever, the range being involved in fitting and removal of the mating housing and the housing. a housing to be fitted with a mating housing; and a lever rotatably mounted to the housing, the housing being fitted with or removed from the mating housing by rotation of the lever; wherein the lever has a pair of side plate portions (13, 13) and a connection portion that connects the side plate portions (13, 13), the side plate portions (13, 13) are located outside both side surfaces of the housing, and have cam grooves (11, 11) in which cam pins (9, 9) on both side surfaces of the mating housing are engaged when the lever is rotated, on both side surfaces of the housing, shaft parts (17, 17) protrude toward the side plate portions (13, 13), the side plate portions (13, 13) have shaft hole parts (19, 19) in which the shaft parts (17, 17) are inserted to allow the lever to be rotated with respect to the housing, each of the shaft hole parts (19, 19) is provided with an insertion hole and regulators (25, 25), characterised in that: on an end portion of each of the shaft parts (17, 17) to be inserted in each of the shaft hole parts (19, 19), a pair of projections (21, 21) arranged in non-point symmetry with respect to a circumferential direction of each of the shaft parts (17, 17), is provided, when the lever is started to be mounted to the housing, the projections (21, 21) are inserted in each of the shaft hole parts (19, 19) through the insertion hole, and the regulators (25, 25) are arranged to face the projections (21, 21) in a direction in which the side plate portions (13, 13) are away from both side surface of the housing, within a rotation range of the lever, the range being involved in fitting and removal of the mating housing and the housing.