View angle-adjustable detachable display assembly

A view angle-adjustable detachable display assembly includes an outer casing mountable in the back opening of the headrest of a vehicle seat, an inner casing fastened pivotally with the inside of the outer casing, an electric contact connector held in a connector holder in the inner casing and connected to a circuit board inside the outer casing through a flexible bus line, and a display panel detachably fastened to the inside of the inner casing by a hook joint.