A lever-type connector comprising: sliders (50U, 50L) each having a cam groove which a driven boss provided to a mating connector is to enter, the number of the sliders (50U, 50L) being limited to two, one of the sliders (50U, 50L) being hereinafter referred to as a first slider, and the other of the sliders (50U, 50L) being hereinafter referred to as a second slider; and a lever for making the first slider and the second slider perform a sliding operation, wherein fitting and separation between the lever-type connector and the mating connector are performed through an operation of the lever, and the first slider and the second slider are positioned in a space between an inner housing, the inner housing holding a contact, and an outer housing (40, 40z) accommodating the inner housing, each of the first slider and the second slider has an inclined surface on a front end thereof in a direction of the lever-type connector fitting with the mating connector, the inner housing and the first slider have first surfaces facing each other, one of the first surfaces having a protrusion, and the other of the first surfaces having a concave portion, the inner housing and the second slider have second surfaces facing each other, one of the second surfaces having a protrusion, and the other of the second surfaces having a concave portion, characterized in that in a separation state of the lever-type connector being separated from the mating connector, the first slider and the second slider are each pushed by a spring (48, 57, 61) to be in a locked state in which the protrusion enters the concave portion, and accordingly, the sliding operation is blocked and the operation of the lever is blocked, and when the lever-type connector starts fitting with the mating connector, a housing of the mating connector pushes the inclined surface of each of the first slider and the second slider, and accordingly, the first slider and the second slider are each displaced in a direction away from the inner housing against a spring force of the spring (48, 57, 61), and the locked state is released. sliders (50U, 50L) each having a cam groove which a driven boss provided to a mating connector is to enter, the number of the sliders (50U, 50L) being limited to two, one of the sliders (50U, 50L) being hereinafter referred to as a first slider, and the other of the sliders (50U, 50L) being hereinafter referred to as a second slider; and a lever for making the first slider and the second slider perform a sliding operation, wherein fitting and separation between the lever-type connector and the mating connector are performed through an operation of the lever, and the first slider and the second slider are positioned in a space between an inner housing, the inner housing holding a contact, and an outer housing (40, 40z) accommodating the inner housing, each of the first slider and the second slider has an inclined surface on a front end thereof in a direction of the lever-type connector fitting with the mating connector, the inner housing and the first slider have first surfaces facing each other, one of the first surfaces having a protrusion, and the other of the first surfaces having a concave portion, the inner housing and the second slider have second surfaces facing each other, one of the second surfaces having a protrusion, and the other of the second surfaces having a concave portion, characterized in that in a separation state of the lever-type connector being separated from the mating connector, the first slider and the second slider are each pushed by a spring (48, 57, 61) to be in a locked state in which the protrusion enters the concave portion, and accordingly, the sliding operation is blocked and the operation of the lever is blocked, and when the lever-type connector starts fitting with the mating connector, a housing of the mating connector pushes the inclined surface of each of the first slider and the second slider, and accordingly, the first slider and the second slider are each displaced in a direction away from the inner housing against a spring force of the spring (48, 57, 61), and the locked state is released.