To provide a key lock device which is reduced in a power consumption cost and in size of a solenoid as a whole.

The key lock device 1 includes a camshaft 3a moving in a press operation direction through the press operation of an operation key, a switching member 3b moving in conjunction with the moving motion of the camshaft 3a to switch an ignition switch through the rotation of the operation key, and solenoid assemblies 4, 5 for regulating the rotation of the switching member 3b or for releasing the regulation of the rotation. The solenoid assemblies 4, 5 have solenoids 4a, 5a moving plungers 41a, 51a in the moving direction through an exciting force and link members 4b, 5b rotating by receiving a cam force generated through the movement of the camshaft 3a. The link members 4b, 5b move the plungers 41a, 51a in the moving direction through the exciting force under the pressure caused by the rotation of the link members.