The invention provides a smart watch which includes a shell, a key component, an ejector pin component, a battery, and a circuit board electrically connected with the battery. The shell is provided with an accommodating cavity. The key component includes keys, an FPC, and a first elastic piece component, a second elastic piece component and key contacts arranged on the FPC. The keys and the ejector pin component are arranged on the shell. The battery, the circuit board, the FPC, the first elastic piece component, the second elastic piece component and the key contacts are accommodated in the accommodating cavity. The keys and the key contacts are oppositely arranged. The ejector pin component and the first elastic piece component are oppositely arranged. The second elastic piece componentand the contacts on the circuit board are oppositely arranged. By arranging the key contacts, the first elastic piece component and the second elastic piece component on the FPC, the key function, thecharging function and the power supply function can be simultaneously achieved through one FPC. Therefore, the assembly process is simplified, space is saved, and the cost is reduced.