An electronic device locking/unlocking mechanism assembled with an electronic device. The locking/unlocking mechanism includes a connection arm movable between a first position and a second position. The connection arm has a first end and a second end. An elastic unit is disposed at the first end of the connection arm to normally apply an elastic force to the connection arm for keeping the connection arm positioned in the first position. A locking section is disposed at the second end of the connection arm. The locking section is held in a dent formed on the electronic device. When the connection arm is moved to the second position, the locking section is released from the held state, whereby a pivot pin is unstressed to automatically bound open the electronic device. This eliminates the problem existing in the conventional mechanism that the electronic device is uneasy to open.