CYLINDER LOCK

PROBLEM TO BE SOLVED: To provide a cylinder lock which can be miniaturized by suppressing the diameter of a holder to a small value, and can cope with various layouts.SOLUTION: In a cylinder lock 1 which includes a cylindrical holder 2, a cylinder 4 rotatably arranged in the holder 2, a sleeve 3 rotatably arranged between the cylinder 4 and the holder 2, a tumbler 5 radially movably stored in the cylinder 4, an output member 6 rotatably arranged at the rear end of the cylinder 4, and a clutch mechanism 7 connecting the cylinder 4 and the output member 6 to each other to transmit the rotation of the cylinder 4 to the output member 6 and releasing the connection between the cylinder 4 and the output member 6 when the sleeve 3 rotates with respect to the holder 2 together with the cylinder 4, the clutch mechanism 7 has a rotation restricting part 14f which, in a state where the connection between the cylinder 4 and the output member 6 is released, engages with the outer peripheral part of the holder 2 from the radially outside.