To provide an electric lock with a guide mechanism which makes a driving arm operate properly by making an engaging protrusion of the driving arm move smoothly in the orbit of a cam plate.

This electric lock comprises: a drive motor which is controlled by a control portion; a gear transmission means for transmitting the driving force of the drive motor; a clutch mechanism which transmits a power transmission force of the gear transmission means; the driving arm 5 which operates via the clutch mechanism; a top joint 6 which is connected to the driving arm 5; and a dead bolt 8 which protrudes/recedes by the driving force of the top joint 6. The guide mechanism Z for the driving arm 5, which is provided in a lock case for the electric lock, comprises the cam plate 16 which is fixed into the lock case and the side surface of which has an annular orbit for guiding the engaging protrusion 15 of the driving arm 5, and an orbit control means 21 for the engaging protrusion 15 which is provided on the cam plate 16. When the driving motor is driven, the engaging protrusion 15 moves in the orbit via the clutch plate 36, constituting the clutch mechanism, while being controlled by the orbit control means 21.