Automated external defibrillator

An automated external defibrillator comprising:

• an operation accepter that accepts an operation input from a user;
• and
• a self-test executor that executes a self-test for checking a state of the automated external defibrillator when a first condition or a second condition has been satisfied;
• wherein:
• the first condition is that a setting time instant set in advance comes;
• the second condition is that the operation accepter accepts a predetermined operation input;
• the operation accepter has a first button that is a power button, and a second button for starting the self-test, the first button being different from the second button;
• and
• the predetermined operation input is pressing down the second button, wherein
• in response to the second button being pressed down again before a predetermined time has passed since the self-test was executed in response to a fact that the second button was pressed down, the automated external defibrillator starts an action for lifesaving.