A wearable electronic device includes: a terminal main body part configured to execute predetermined processing; a first button for performing an operation input to the terminal main body part; and a wearable member configured to support the terminal main body part and the first button, and capable of being worn on a finger of a wearer. The first button is arranged on the wearable member such that, when the wearable member is worn, the first button is positioned on a nail side around a thumb of the wearer.