A mobile phone holder includes: a bottom plate having a first coupling part; a top plate having a second coupling part; and a light emitting unit mounted on the top plate. The top plate is connected movably to the bottom plate, and is movable between an unfolded position and a folded position, where the top plate is disposed above the bottom plate and cooperates with the bottom plate to confine a receiving space. The top plate is formed with an access hole in spatial communication with the receiving space when the top plate is disposed at the folded position, thereby permitting insertion of a mobile phone into the receiving space via the access hole. The second coupling part is capable of removable engagement with the first coupling part when the top plate is disposed at the folded position, thereby retaining releasably the top plate at the folded position.