A reverse-input blocking clutch (1, 1a, 1b), comprising: a pressed member (4, 4a) including a first pressed member element having a pressed surface (24, 24a) around an inner peripheral surface thereof and an inner-diameter-side fitting surface on an outer peripheral surface thereof, and a second pressed member element having a mounting portion (64, 64a) fixed to a portion that does not rotate during use and an outer-diameter-side fitting surface externally fitted to the inner-diameter-side fitting surface without looseness with regard to a radial direction on an inner peripheral surface thereof, an input member (2, 2a) rotatably supported with respect to one of the first pressed member element or the second pressed member element, an output member coaxially arranged with the input member and rotatably supported with respect to the other of the first pressed member element or the second pressed member element, and an engaging element (5, 5a) configured to transmit rotational torque input to the input member (2, 2a) to the output member when the rotational torque is input to the input member (2, 2a) by moving in a direction away from the pressed surface based on engagement with the input member (2, 2a) and engaging with the output member, and to completely block rotational torque reversely input to the output member or transmit a part of the rotational torque reversely input to the output member to the input member (2, 2a) and block a remaining part thereof when the rotational torque is reversely input to the output member by moving in a direction toward the pressed surface (24, 24a) based on engagement with the output member to come into contact with the pressed surface (24, 24a). a pressed member (4, 4a) including a first pressed member element having a pressed surface (24, 24a) around an inner peripheral surface thereof and an inner-diameter-side fitting surface on an outer peripheral surface thereof, and a second pressed member element having a mounting portion (64, 64a) fixed to a portion that does not rotate during use and an outer-diameter-side fitting surface externally fitted to the inner-diameter-side fitting surface without looseness with regard to a radial direction on an inner peripheral surface thereof, an input member (2, 2a) rotatably supported with respect to one of the first pressed member element or the second pressed member element, an output member coaxially arranged with the input member and rotatably supported with respect to the other of the first pressed member element or the second pressed member element, and an engaging element (5, 5a) configured to transmit rotational torque input to the input member (2, 2a) to the output member when the rotational torque is input to the input member (2, 2a) by moving in a direction away from the pressed surface based on engagement with the input member (2, 2a) and engaging with the output member, and to completely block rotational torque reversely input to the output member or transmit a part of the rotational torque reversely input to the output member to the input member (2, 2a) and block a remaining part thereof when the rotational torque is reversely input to the output member by moving in a direction toward the pressed surface (24, 24a) based on engagement with the output member to come into contact with the pressed surface (24, 24a).