The present invention relates to a head mounted electronic device, including a headphone and a display portion. The headphone includes a C-shaped elastic belt including two coupling ends; two movable members, each being rotatably coupled to a corresponding coupling end along a first axis; and two speakers, each being rotatably coupled to a corresponding movable component along a second axis. The display portion includes a main body, configured to produce and project images outwardly; and two coupling components, coupled to two opposite ends of the main body and each being rotatably coupled to a corresponding speaker along a third axis. Each of the two speakers is configured to rotate along the first axis and the second axis defined by a corresponding movable member, respectively, when the speaker rotates along its respective third axis in response to the movement of the display portion.